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  • prudencia en la mujer, La (work by Tirso de Molina)

    Tirso de Molina: …analysis of mob emotion; in La prudencia en la mujer (1634; “Prudence in Woman”), with its modern interpretation of ancient regional strife; and in the biblical La venganza de Tamar (1634), with its violently realistic scenes.

  • prudentes

    Lawyer, one trained and licensed to prepare, manage, and either prosecute or defend a court action as an agent for another and who also gives advice on legal matters that may or may not require court action. The lawyer applies the law to specific cases. He investigates the facts and the evidence by

  • prudential anthropocentrism (philosophy)

    anthropocentrism: Sometimes called prudential or enlightened anthropocentrism, this view holds that humans do have ethical obligations toward the environment, but they can be justified in terms of obligations toward other humans. For instance, environmental pollution can be seen as immoral because it negatively affects the lives of other people, such…

  • Prudential Building (building, Buffalo, New York, United States)

    Louis Sullivan: Work in association with Adler: The 16-story Guaranty (now Prudential) Building in Buffalo by Adler and Sullivan is similar except that its surface is sheathed in decorative terra-cotta instead of red brick. Both buildings are among the best of Adler and Sullivan’s work.

  • Prudential Friendly Society (American company)

    John Fairfield Dryden: …businessman, the founder of the Prudential Insurance Company of America, the first company to issue industrial life insurance in the United States.

  • Prudential Insurance Company of America (American company)

    John Fairfield Dryden: …businessman, the founder of the Prudential Insurance Company of America, the first company to issue industrial life insurance in the United States.

  • Prudentius (Christian poet)

    Prudentius, Christian Latin poet whose Psychomachia (“The Contest of the Soul”), the first completely allegorical poem in European literature, was immensely influential in the Middle Ages. Prudentius practiced law, held two provincial governorships, and was awarded a high position by the Roman e

  • Prudhoe Bay (inlet, Alaska, United States)

    Prudhoe Bay, small inlet of the Beaufort Sea and Arctic Ocean, indenting the northern coast of Alaska, U.S. It is situated about 200 miles (320 km) east-southeast of Point Barrow. The bay has been the centre of drilling activities since the discovery of vast petroleum deposits on Alaska’s North

  • Prudhomme, Paul (American chef and restaurateur)

    Paul Prudhomme, American chef (born July 13, 1940, near Opelousas, La.—died Oct. 8, 2015, New Orleans, La.), introduced the United States and the world to the Cajun and Creole cuisines of Louisiana and contributed to the advent of the regional cooking trend in high-end restaurants. His signature

  • Prudhomme, René-François-Armand (French poet)

    Sully Prudhomme, French poet who was a leading member of the Parnassian movement, which sought to restore elegance, balance, and aesthetic standards to poetry, in reaction to the excesses of Romanticism. He was awarded the first Nobel Prize for Literature in 1901. Sully Prudhomme studied science at

  • Prudhomme, Sully (French poet)

    Sully Prudhomme, French poet who was a leading member of the Parnassian movement, which sought to restore elegance, balance, and aesthetic standards to poetry, in reaction to the excesses of Romanticism. He was awarded the first Nobel Prize for Literature in 1901. Sully Prudhomme studied science at

  • Prufrock and Other Observations (work by Eliot)

    T.S. Eliot: Early publications: …appearance of Eliot’s first volume, Prufrock and Other Observations, in 1917, one may conveniently date the maturity of the 20th-century poetic revolution. The significance of the revolution is still disputed, but the striking similarity to the Romantic revolution of Coleridge and Wordsworth is obvious: Eliot and Pound, like their 18th-century…

  • Prufrock, J. Alfred (fictional character)

    J. Alfred Prufrock, fictional character, the indecisive middle-aged man in whose voice Anglo-American poet T.S. Eliot wrote the dramatic monologue “The Love Song of J. Alfred Prufrock”

  • Pruitt, Scott (American attorney and politician)

    Donald Trump: Cabinet appointments: Environmental Protection Agency (EPA), Scott Pruitt, who as Oklahoma attorney general had spent much of his career suing the EPA on behalf of the oil and gas industry, and his choice for secretary of education, Betsy DeVos, who had frequently expressed contempt for public education while promoting and financially…

  • Prunariu, Dumitru (Romanian pilot and cosmonaut)

    Dumitru Prunariu, Romanian pilot and cosmonaut who was the first Romanian citizen in space. Prunariu earned a degree in aerospace engineering from the Polytechnic University in Bucharest in 1976. In 1978 he became a senior lieutenant in the air force and was selected for spaceflight training as

  • Prunariu, Dumitru Dorin (Romanian pilot and cosmonaut)

    Dumitru Prunariu, Romanian pilot and cosmonaut who was the first Romanian citizen in space. Prunariu earned a degree in aerospace engineering from the Polytechnic University in Bucharest in 1976. In 1978 he became a senior lieutenant in the air force and was selected for spaceflight training as

  • prune (fruit)

    Prune, dried plum. See

  • Prunella (bird)

    Accentor, (genus Prunella), any of about 13 species of bird in the Old World family Prunellidae (order Passeriformes). They have slender bills and rounded wings, and they frequently hop or move with a peculiar motion that has given them another name, shufflewing. The accentors range in colour from

  • Prunella (plant)

    Self-heal, (genus Prunella), genus of 13 species of low-growing perennials in the mint family (Lamiaceae), native to Eurasia and North America. Several species, especially common self-heal (Prunella vulgaris), large-flowered self-heal (P. grandiflora), and cutleaf self-heal (P. lacinata), were

  • Prunella collaris (bird)

    accentor: The alpine accentor (Prunella collaris), which ranges from Spain and northwestern Africa to Japan, is at 18 cm (7 inches) long the largest and stoutest of the accentors. Both sexes are mostly brown with reddish-spotted flanks and a heavily stippled throat. In courtship the male warbles…

  • Prunella grandiflora (plant)

    self-heal: …especially common self-heal (Prunella vulgaris), large-flowered self-heal (P. grandiflora), and cutleaf self-heal (P. lacinata), were regarded in medieval times as cure-alls and are still used in herbal medicine. The dried leaves and flowers are commonly brewed for soothing sore throats. Other common names include heal-all and allheal.

  • Prunella lacinata (plant)

    self-heal: grandiflora), and cutleaf self-heal (P. lacinata), were regarded in medieval times as cure-alls and are still used in herbal medicine. The dried leaves and flowers are commonly brewed for soothing sore throats. Other common names include heal-all and allheal.

  • Prunella modularis (bird)

    Dunnock, (Prunella modularis), a drab, skulking European songbird, a species of accentor belonging to the family Prunellidae. Moving with a jerky, shuffling gait, this abundant but unobtrusive little bird spends much of its time among shrubs and hedgerows but often forages on the ground for tiny

  • pruning (horticulture)

    Pruning, in horticulture, the removal or reduction of parts of a plant, tree, or vine that are not requisite to growth or production, are no longer visually pleasing, or are injurious to the health or development of the plant. Pruning is common practice in orchard and vineyard management for the

  • Prunoideae (plant subfamily)

    Rosales: Evolution: The subfamily Amygdaloideae is represented by fossil fruit pits of Prunus from the Eocene to the Pleistocene and of Prinsepia from the Oligocene to the Pliocene.

  • Prunus (plant genus)

    Prunus, genus of more than 400 species of flowering shrubs and trees in the rose family (Rosaceae). The genus Prunus is native to northern temperate regions. It has a number of economically important members, including the cultivated almond, peach, plum, cherry, and apricot. In addition, many

  • Prunus armeniaca (tree and fruit)

    Apricot, (Prunus armeniaca), stone fruit of the family Rosaceae (order Rosales), closely related to peaches, almonds, plums, and cherries. Apricots are cultivated throughout the temperate regions of the world, especially in the Mediterranean. They are eaten fresh or cooked and are preserved by

  • Prunus avium (plant)

    Rosales: Wood: avium (European wild, or sweet, cherry) is used to make high-quality furniture, and the wood of Pyrus communis (pear) is also highly valued. The wood of black cherry, native to North America, has a reddish brown colour and a warm luster when finished. It resists shrinkage…

  • Prunus cerasifera (plant)

    plum: …number of species, including the purple-leaf plum (P. cerasifera), are used as ornamental plants for their attractive flowers and leaves.

  • Prunus domestica (plant)

    plum: The European plum (P. domestica) and the Japanese plum (P. salicina) are grown commercially for their fruits, and a number of species, including the purple-leaf plum (P. cerasifera), are used as ornamental plants for their attractive flowers and leaves.

  • Prunus dulcis (tree and nut)

    Almond, (Prunus dulcis), tree native to southwestern Asia and its edible seed. A member of the family Rosaceae (order Rosales), Prunus dulcis is an economically important crop tree grown primarily in Mediterranean climates between 28° and 48° N and between 20° and 40° S, with California producing

  • Prunus dulcis amara (tree and nut)

    almond: dulcis variety dulcis) and bitter almond (P. dulcis variety amara). Sweet almonds are the familiar, edible type consumed as nuts and used in cooking or as a source of almond oil or almond meal. The oil of bitter almonds is used in the manufacture of flavouring extracts for foods…

  • Prunus dulcis dulcis (tree and nut)

    almond: There are two varieties, sweet almond (P. dulcis variety dulcis) and bitter almond (P. dulcis variety amara). Sweet almonds are the familiar, edible type consumed as nuts and used in cooking or as a source of almond oil or almond meal. The oil of bitter almonds is used in…

  • Prunus institia (plant)

    plum: …or Asiatic origin, is the Damson plum (P. insititia); ancient writings connect early cultivation of those plums with the region around Damascus. The Japanese plum was first domesticated in China thousands of years ago but was extensively developed in Japan; from there it was introduced to the rest of the…

  • Prunus laurocerasus (plant)

    Cherry laurel, either of two species of evergreen plants of the genus Prunus, in the rose family (Rosaceae). Cherry laurels are named for their similarity to the unrelated bay laurel (Laurus nobilis, of the family Lauraceae), and they are cultivated as ornamentals, particularly as hedge plants, in

  • Prunus pennsylvanica (tree)

    ecological disturbance: Disturbance frequency and recovery: The biology of pin cherries (Prunus pensylvanica) illustrates an extension of this theme. In the course of secondary succession in forests of the eastern United States and southern Canada, these small trees grow into gaps and are abundant for periods of about 10 to 25 years; over time,…

  • Prunus persica (fruit and tree)

    Nectarine, (Prunus persica), smooth-skinned peach of the family Rosaceae that is grown throughout the warmer temperate regions of both the Northern and Southern hemispheres. A genetic variant of common peaches, the nectarine was most likely domesticated in China more than 4,000 years ago, and

  • Prunus persica (tree and fruit)

    Peach, (Prunus persica), fruit tree of the rose family (Rosaceae), grown throughout the warmer temperate regions of both the Northern and Southern hemispheres. Peaches are widely eaten fresh and are also baked in pies and cobblers; canned peaches are a staple commodity in many regions.

  • Prunus salicina (plant and fruit)

    plum: domestica) and the Japanese plum (P. salicina) are grown commercially for their fruits, and a number of species, including the purple-leaf plum (P. cerasifera), are used as ornamental plants for their attractive flowers and leaves.

  • Prunus serotina (plant)

    Rosales: Wood: …wood of Prunus serotina (black cherry) and P. avium (European wild, or sweet, cherry) is used to make high-quality furniture, and the wood of Pyrus communis (pear) is also highly valued. The wood of black cherry, native to North America, has a reddish brown colour and a warm luster…

  • Prunus spinosa (shrub)

    Blackthorn, (Prunus spinosa), spiny shrub of the rose family (Rosaceae), native to Europe but cultivated in other regions. Blackthorn usually grows less than 3.6 metres (12 feet) tall and has numerous small deciduous leaves. Its dense growth makes it suitable for hedges. The white flowers, about 2

  • prunus vase (pottery)

    Meiping, (English: “prunus vase”) type of Chinese pottery vase inspired by the shape of a young female body. The meiping was often a tall celadon vase made to resemble human characteristics, especially a small mouth, a short, narrow neck, a plump bosom, and a concave belly. It was meant to hold a

  • Prunus virginiana (plant)

    Chokecherry, (Prunus virginiana), deciduous shrub or small tree belonging to the rose family (Rosaceae), native to North America. It is aptly named for the astringent, acidic taste of its reddish cherries, which may be made into jelly and preserves. The stones and foliage are poisonous and may

  • Prunus virginiana variety demissa (plant)

    chokecherry: …with yellow or crimson fruit; western chokecherry (P. virginiana, variety demissa), with a fuzzy underleaf and dark red fruit; and black chokecherry (P. virginiana, variety melanocarpa), with black fruit.

  • Prunus virginiana variety melanocarpa (plant)

    chokecherry: …and dark red fruit; and black chokecherry (P. virginiana, variety melanocarpa), with black fruit.

  • Prunus virginiana variety virginiana (plant)

    chokecherry: There are several varieties, including eastern chokecherry (Prunus virginiana, variety virginiana), with yellow or crimson fruit; western chokecherry (P. virginiana, variety demissa), with a fuzzy underleaf and dark red fruit; and black chokecherry (P. virginiana, variety melanocarpa), with black fruit.

  • pruritus (physiology)

    Itching, a stimulation of free nerve endings, usually at the junction of the dermis and epidermis of the skin, that evokes a desire to scratch. It has been suggested that an itch is a subthreshold sensation of pain; however, although both itch and pain sensations share common nerve pathways, they

  • Prus, Bolesław (Polish writer)

    Bolesław Prus, Polish journalist, short-story writer, and novelist who was one of the leading figures of the Positivist period in Polish literature following the 1863 January Insurrection against Russian rule. Born to an impoverished gentry family, Prus was orphaned early in life and struggled

  • Prusa (Turkey)

    Bursa, city, northwestern Turkey. It is situated along the northern foothills of Ulu Dağ (the ancient Mysian Olympus). Probably founded by a Bithynian king in the 3rd century bce, it prospered during Byzantine times after the emperor Justinian I (reigned 527–565 ce) built a palace there. The city

  • Prusaeus, Dio (Greek philosopher)

    Dio Chrysostom, (Latin: “Dio the Golden-Mouthed”) Greek rhetorician and philosopher who won fame in Rome and throughout the empire for his writings and speeches. Dio was banished in 82 ce for political reasons from both Bithynia and Italy. He wandered for 14 years through the lands near the Black

  • Prusias I (king of Bithynia)

    Hannibal: Exile and death: …to the court of King Prusias of Bithynia, or he joined the rebel forces in Armenia. Eventually he took refuge with Prusias, who at that time was engaged in warfare with Rome’s ally, King Eumenes II of Pergamum. He served Prusias in that war, and, in one of the victories…

  • Prusiner, Stanley B. (American biochemist and neurologist)

    Stanley B. Prusiner, American biochemist and neurologist whose discovery in 1982 of disease-causing proteins called prions won him the 1997 Nobel Prize for Physiology or Medicine. Prusiner grew up in Cincinnati, Ohio, and was educated at the University of Pennsylvania (A.B., 1964; M.D., 1968).

  • Prusoff, William Herman (American pharmacologist)

    William Herman Prusoff, American pharmacologist (born June 25, 1920, Brooklyn, N.Y.—died April 3, 2011, Branford, Conn.), developed the first antiviral drug approved by the U.S. Food and Drug Administration (FDA). The agent, idoxuridine, was used in the treatment of infant keratitis (inflammation

  • Prussia (region, Europe)

    Prussia, in European history, any of certain areas of eastern and central Europe, respectively (1) the land of the Prussians on the southeastern coast of the Baltic Sea, which came under Polish and German rule in the Middle Ages, (2) the kingdom ruled from 1701 by the German Hohenzollern dynasty,

  • Prussian Archangel (work by Sachlichkeit, Schlichter and Heartfield)

    John Heartfield: … artist Rudolf Schlichter, Heartfield created Prussian Archangel, a dummy of a German soldier with a papier-mâché pig’s head that hung from the ceiling of the Dada exhibition gallery. The figure’s body was wrapped with a sign that read “I come from Heaven, from Heaven on high.” The work attracted the…

  • Prussian blue (pigment)

    Prussian blue, any of several deep-blue pigments that are composed of complex iron cyanides and hence called iron blues. The most common of these pigments are Prussian, Chinese, Milori, and toning blue. Prussian blue has a reddish tint and is used almost exclusively in paints, enamels, and

  • Prussian Civil Code

    Prussian Civil Code, (“General State Law”), the law of the Prussian states, begun during the reign of Frederick the Great (1740–86) but not promulgated until 1794 under his successor, Frederick William II. It was to be enforced wherever it did not conflict with local customs. The code was adopted b

  • Prussian Cultural Property Foundation (German organization)

    Germany: Museums and galleries: …include the museums of the Prussian Cultural Property Foundation in Berlin—i.e., the Pergamon Museum with its vast collection of Classical and Middle Eastern antiquities, located on the “Museum Island” in the River Spree, together with the Old (Altes) Museum, the New (Neues) Museum, the National Gallery (Nationalgalerie), and the Bode…

  • Prussian Customs Law of 1818 (Prussian history)

    international trade: The Zollverein: A common tariff, the Prussian Tariff of 1818, shielded the member states from foreign competition, but free trade was the rule internally.

  • Prussian language, Old

    Old Prussian language, West Baltic language extinct since the 17th century; it was spoken in the former German area of East Prussia (now in Poland and Russia). The poorly attested Yotvingian dialect was closely related to Old Prussian. Old Prussian preserved many archaic Baltic features that do

  • Prussian Tariff of 1818 (Prussian history)

    international trade: The Zollverein: A common tariff, the Prussian Tariff of 1818, shielded the member states from foreign competition, but free trade was the rule internally.

  • Prussian Union (German history)

    Germany: The 1850s: years of political reaction and economic growth: …federal league known as the Prussian Union. If Frederick William IV had acted with enough determination, he might have been able to reach his goal before Francis Joseph could intervene effectively in the affairs of Germany. But he allowed his opportunity to slip away. Though he succeeded through threats and…

  • Prussian Union (German religious history [1817])

    Lutheranism: Modernity: …the name Churches of the Prussian Union.

  • prussic acid (chemical compound)

    cereal processing: Cassava: Their prussic acid level must be reduced to safe limits by boiling; the duration of boiling depends on the variety of the leaves. Cassava leaves are a popular vegetable in Africa, and the tuber also is used in meal for animal feed.

  • Prusso-Danish War (European history)

    German-Danish War, (1864), the second of two conflicts over the settlement of the Schleswig-Holstein question, a complex of problems arising from the relationship of the duchies of Schleswig and Holstein to Denmark, to each other, and to the German Confederation. Involved in it were a disputed

  • Prusy (region, Europe)

    Prussia, in European history, any of certain areas of eastern and central Europe, respectively (1) the land of the Prussians on the southeastern coast of the Baltic Sea, which came under Polish and German rule in the Middle Ages, (2) the kingdom ruled from 1701 by the German Hohenzollern dynasty,

  • Prut River (river, Europe)

    Prut River, a tributary of the Danube River, now forming the boundary of Romania with Moldova. Prior to 1940 and the taking of Bessarabia by the Soviet Union, the Prut was almost entirely in Romania. It rises on the northeastern slopes of the Eastern Carpathians in southwestern Ukraine and flows

  • Pruth River (river, Europe)

    Prut River, a tributary of the Danube River, now forming the boundary of Romania with Moldova. Prior to 1940 and the taking of Bessarabia by the Soviet Union, the Prut was almost entirely in Romania. It rises on the northeastern slopes of the Eastern Carpathians in southwestern Ukraine and flows

  • Pruth, Treaty of the (Russia-Ottoman Empire [1711])

    Ottoman Empire: Military defeats and the emergence of the Eastern Question, 1683–1792: …Russia again, and at the Treaty of the Pruth (1711) it regained some territories previously lost. The war of 1714–18 with Venice and Austria was concluded by the Treaty of Passarowitz (1718); and three wars with Russia and Austria, in 1736–39, 1768–74, and 1787–92, culminated in the treaties of Belgrade…

  • Prutkov, Kozma (Russian literary pseudonym)

    Aleksey Konstantinovich, Count Tolstoy: …under the joint pseudonym “Kozma Prutkov,” who is portrayed as a clerk in the Ministry of Finance. Other satirical verses were written under Tolstoy’s own name. Son statskogo sovetnika Popova (1878; “The Dream of Councillor Popov”) makes fun of Russian bureaucracy and political careerism.

  • Prutkov, Kozma (Russian writer)

    Aleksey Konstantinovich, Count Tolstoy, Russian poet, novelist, and dramatist, an outstanding writer of humorous and satirical verse, serious poetry, and novels and dramas on historical themes. A distant relative of Leo Tolstoy, Aleksey Konstantinovich held various honorary posts at court and spent

  • Prutul River (river, Europe)

    Prut River, a tributary of the Danube River, now forming the boundary of Romania with Moldova. Prior to 1940 and the taking of Bessarabia by the Soviet Union, the Prut was almost entirely in Romania. It rises on the northeastern slopes of the Eastern Carpathians in southwestern Ukraine and flows

  • Prvni parta (work by Capek)

    Karel Čapek: …realistic novel Prvni parta (1937; The First Rescue Party) stressed the need for solidarity. In his last plays the appeal became more direct. Bílá nemoc (1937; Power and Glory) presented the tragedy of the noble pacifist; and Matka (1938; The Mother) vindicated armed resistance to barbaric invasion.

  • Prvovenčani, Stefan (king of Serbia)

    Serbia: The Golden Age: …in favour of his son Stefan (known as Prvovenčani, the “First-Crowned”), who in 1217 secured from Pope Honorius III the title of “king of Serbia, Dalmatia, and Bosnia.” Under the Nemanjić dynasty, which was to rule the Serb lands for the next 200 years, a powerful state emerged to dominate…

  • PRWORA (United States [1996])

    entitlement: With passage of the Personal Responsibility and Work Opportunity Act (PRWORA) in 1996, most needs-based assistance programs, including AFDC, were replaced by state-controlled systems funded by federal block grants. (See also social insurance; welfare.)

  • Pryazovska Vysochyna (region, Ukraine)

    Azov Upland, hilly region, southeastern Ukraine. Part of the Ukrainian Crystalline Shield, the Azov Upland is an area of denuded mountains, extending from the Dnieper River for 100 miles (160 km) to the Donets Ridge and sloping gently down southeastward to the Sea of Azov. The highest point is

  • Prychornomorska Lowland (region, Ukraine)

    Dnieper River: Physiography: …Dnieper basin lies within the Black Sea Lowland, in the black-soil steppe area, which has now been completely plowed up. The grassy steppe vegetation has been preserved only in the nature reserves and preserves and in old ravines and gullies. Near the Black Sea there is wormwood–fescue vegetation of the…

  • Pryderi (Celtic deity)

    Pwyll: She bore him a son, Pryderi, who was abducted by Gwawl. Pryderi was later restored to his parents and succeeded Pwyll as ruler both in Dyfed and Annwn. In Arthurian legend, Pwyll’s caldron became the Holy Grail, and Pwyll appeared as Pelles, the keeper of the Grail.

  • Prydniprivska Lowland (region, Europe)

    Ukraine: Resources and power: …brown coal found in the Dnieper River basin (north of Kryvyy Rih) and the bituminous coal deposits of the Lviv-Volyn basin. The coal mines of Ukraine are among the deepest in Europe. Many of them are considered dangerous because their depth contributes to increased levels of methane; methane-related explosions have…

  • Prydniprovska Upland (upland, Eastern Europe)

    Ukraine: Relief: The rolling plain of the Dnieper Upland, which lies between the middle reaches of the Dnieper (Dnipro) and Southern Buh (Pivdennyy Buh, or the Boh) rivers in west-central Ukraine, is the largest highland area; it is dissected by many river valleys, ravines, and gorges, some more than 1,000 feet (300…

  • Prydnyaproŭskaya Nizina (region, Europe)

    Ukraine: Resources and power: …brown coal found in the Dnieper River basin (north of Kryvyy Rih) and the bituminous coal deposits of the Lviv-Volyn basin. The coal mines of Ukraine are among the deepest in Europe. Many of them are considered dangerous because their depth contributes to increased levels of methane; methane-related explosions have…

  • Pryluka (Ukraine)

    Pryluky, city, northern Ukraine, on the Uday River. It is one of the oldest cities in Ukraine, being first documented in 1092. It was destroyed by the Mongols in the 13th century. In modern times it became a centre of the oil industry based on local deposits (those of the Dnieper-Donets

  • Pryluky (Ukraine)

    Pryluky, city, northern Ukraine, on the Uday River. It is one of the oldest cities in Ukraine, being first documented in 1092. It was destroyed by the Mongols in the 13th century. In modern times it became a centre of the oil industry based on local deposits (those of the Dnieper-Donets

  • Prymnesiales (protist)

    algae: Evolution and paleontology of algae: Coccolithophores, coccolith-bearing members of the Prymnesiophyceae, date from the Late Triassic (227 million to 201.3 million years ago), with one reported from approximately 280 million years ago. Coccolithophores were extremely abundant during the Mesozoic Era (252.2 million to 66 million years ago), contributing to deep…

  • prymnesin (protistan toxin)

    poison: Protistan poisons: …the poison is known as prymnesin.

  • Prymnesiophyceae (class of algae)

    algae: Annotated classification: Class Prymnesiophyceae (Haptophyceae) Many with haptonema, a hairlike appendage between two flagella; no tubular hairs; many with organic scales; some deposit calcium carbonate on scales to form coccoliths; coccolithophorids may play a role in global warming because they can remove large amounts of carbon from the…

  • Prymnesiophyta (protist)

    protozoan: Annotated classification: Haptophyta Photosynthetic. Possess a unique flagellar structure called a haptonema, a “3rd flagellum,” located between the 2 regular flagella, that is thought to function in feeding (usually mixotrophic); haptonema is missing or reduced in some taxa. Organic scales are Golgi-derived and made partly of cellulose;…

  • Prymnesium (algae genus)

    algae: Annotated classification: Emiliania, Phaeocystis, and Prymnesium. Class Raphidophyceae (Chloromonadophyceae) Flagellates with mucocysts (mucilage-releasing bodies) occasionally found in freshwater or marine environments; fewer than 50 species; includes Chattonella, Gonyostomum, Heterosigma, Psammamonas, and Vacuolaria

  • Prymnesium parvum (alga)

    algae: Toxicity: Prymnesium parvum (class Prymnesiophyceae) has caused massive die-offs in ponds where fish are cultured, and Chrysochromulina polylepis (class Prymnesiophyceae) has caused major fish kills along the coasts of the Scandinavian countries. Other algae, such as Heterosigma (class Raphidophyceae) and Dictyocha (class Dictyochophyceae), are suspected fish…

  • Prynne, Hester (fictional character)

    Hester Prynne, fictional character, the long-suffering ennobled protagonist of The Scarlet Letter (1850) by Nathaniel

  • Prynne, William (English pamphleteer)

    William Prynne, English Puritan pamphleteer whose persecution by the government of King Charles I (reigned 1625–49) intensified the antagonisms between the king and Parliament in the years preceding the English Civil Wars (1642–51). Though trained as a lawyer, Prynne began to publish Puritan tracts

  • Pryor (Oklahoma, United States)

    Pryor, city, seat (1907) of Mayes county, northern Oklahoma, U.S., located northeast of Tulsa. It was settled in 1872 and named for Nathaniel Pryor, a scout on the Lewis and Clark Expedition and the builder of a trading post (1820) on the Verdigris River near the present city site. Pryor is a trade

  • Pryor Creek (Oklahoma, United States)

    Pryor, city, seat (1907) of Mayes county, northern Oklahoma, U.S., located northeast of Tulsa. It was settled in 1872 and named for Nathaniel Pryor, a scout on the Lewis and Clark Expedition and the builder of a trading post (1820) on the Verdigris River near the present city site. Pryor is a trade

  • Pryor, Aaron (American boxer)

    Aaron Pryor, American boxer (born Oct. 20, 1955, Cincinnati, Ohio—died Oct. 9, 2016, Cincinnati), was a relentless and ferocious fighter who was best known for his two successful battles against Nicaraguan great Alexis Arguello, both in defense of the WBA junior welterweight crown. Pryor began

  • Pryor, Frederic L. (American political prisoner)

    Rudolf Abel: …was exchanged for Powers and Frederic L. Pryor, an American student who had been held without charge in East Germany since August 1961.

  • Pryor, Richard (American comedian and actor)

    Richard Pryor, American comedian and actor, who was one of the leading comics of the 1970s and ’80s. His comedy routines drew on a variety of downtrodden urban characters, rendered with brutal emotional honesty. Pryor, an African American, began working in clubs in the early 1960s, developing his

  • Pryor, Richard Franklin Lennox Thomas, III (American comedian and actor)

    Richard Pryor, American comedian and actor, who was one of the leading comics of the 1970s and ’80s. His comedy routines drew on a variety of downtrodden urban characters, rendered with brutal emotional honesty. Pryor, an African American, began working in clubs in the early 1960s, developing his

  • Pryp’yat (Ukraine)

    Chernobyl disaster: …situated at the settlement of Pryp’yat, 10 miles (16 km) northwest of the city of Chernobyl (Ukrainian: Chornobyl) and 65 miles (104 km) north of Kiev, Ukraine. The station consisted of four reactors, each capable of producing 1,000 megawatts of electric power; it had come online in 1977–83.

  • Pryp’yat River (river, Europe)

    Pripet River, river in Ukraine and Belarus, a tributary of the Dnieper River. It is 480 miles (775 km) long and drains an area of 44,150 square miles (114,300 square km). It rises in northwestern Ukraine near the Polish border and flows eastward in Ukraine and then Belarus through a flat, forested,

  • Prypyats’ River (river, Europe)

    Pripet River, river in Ukraine and Belarus, a tributary of the Dnieper River. It is 480 miles (775 km) long and drains an area of 44,150 square miles (114,300 square km). It rises in northwestern Ukraine near the Polish border and flows eastward in Ukraine and then Belarus through a flat, forested,

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