Pi The mathematical constant p is an irrational number real number, approximately equal to 3.14159, which is the ratio of a circle's circumference to its diameter in Euclidean geometry, and has many uses in mathematics, physics, and engineering.
	Piaffe The piaffe is a high school dressage movement where the horse is in a highly collected and cadenced trot, in place or nearly in place. The center of gravity of the horse should be more towards the hind end, with the hindquarters slightly lowered and great bending of the joints in the hind legs.
	Pianist A pianist is a person who plays the piano. A professional pianist can perform solo pieces, play with an orchestra or smaller musical ensemble, or accompany one or more singers or solo instrumentalists. A performing European classical music pianist usually starts playing piano at a very young age, some as early as three years old.
	Piano piano or pianoforte is a musical instrument classified as a keyboard instrument, percussion instrument, or string instrument instrument, depending on the system of musical instrument classification used. The piano produces sound by striking steel strings with felt hammers that immediately rebound allowing the string to continue vibrating.
	Piano accordion A piano accordion is a type of accordion having a right-hand keyboard similar to a piano. It may have any of the available left-hand keyboard systems.
	Piastre The piastre, originally a United States dollar-size silver coin, served as the major unit of currency of French Indochina, and in the Ottoman Empire. Early private bank currency issues in Canadian French regions of Canada were denominated in piastres.
	Piazza A piazza is an open city square, found in Italy. The term is roughly equivalent to the Spanish language plaza. Piazza has taken some slightly different meanings in United Kingdom and in United States. In Ethiopia, it is used to refer to a part of a city.
	Píca P?ca (), sometimes short pica or pyca (), is a Czech language and Slovak language profanity that refers to the vagina similar to the English language word cunt. It is often represented as a symbol of a rhombus standing on one of its sharper tips; both of these tips are connected by a vertical line representing a vulva.
	Picador A picador is one of the pair of horsemen in a Spain bullfight who jabs the bull with a lance to weaken its neck and shoulder muscles. They perform in the tercio de varas which is the first of the three stages in a Spanish bullfight.
	Picardy Picardy is an historical province of France, in the north of France. The historical capital and largest city is Amiens. According to Edward Gibbon, Whimsical enough is the origin of the name of Picards, and from thence of Picardie, which does not date earlier than AD 1200.
	Piccalilli Piccalilli is a Pickling of chopped vegetables and hot spices, generally Culinary mustard. Ingredients may include tomato, cabbage, gherkins, cauliflower and onions, but virtually any type of vegetable can be used. The vegetables are cut to small pieces, blanching and covered with a mixture of mustard, vinegar, salt, sugar and spices, such as turmeric, which is responsible for the bright yellow colour of many piccalillis.
	Piccolo The piccolo is a small flute. Its name in Italian is "flauto piccolo" which means "small flute". Like the flute, the piccolo is normally pitched in the key of C, about one octave above the concert flute. Music for the piccolo is written one octave lower than the sounds desired in order to avoid too many ledger lines above the Musical staff.
	Picidae The avian Family Picidae includes the woodpeckers, piculets and wrynecks. Members of this family are found worldwide, except for Australia, Madagascar, and the extreme polar regions. Most species live in forests or woodland habitats, although a few species are known to live in desert areas.
	Piciformes Six families of largely arboreal birds make up the Order Piciformes, the best-known of them being the Picidae, which includes the woodpeckers and close relatives. There are about 67 genera in the six families and a little over 400 species. In general, the Piciformes are insectivorous, although the toucans mostly eat fruit and the honeyguides beeswax.
	Pickaxe A pickaxe is a hand tool with a hard head attached perpendicular to the handle. Some people make the distinction that a pickaxe has a head with a pointed end and a flat end, and a pick has both ends pointed, or only one end; but most people use the words to mean the same thing. The head is most commonly made of metal, and the handle is most commonly wood or metal.
	Pickelhaube The Pickelhaube was a Prussian spiked helmet worn in the 19th century by the Germany military, firefighters, and police. The famous spike is purely decorative, and Paul von Hindenburg suggested in a famous speech that it suggested a symbolic link between the German soldiers and the historical Huns.
	Pickerel Frog The Pickerel Frog is a small North American frog, characterized by the appearance of seemingly "hand-drawn" squares on their Dorsum surface. All other leopard frogs have circular spots.
	Pickeringia montana The Fabaceae Pickeringia montana is known by the common name chaparral pea. It is one of very few legumes native to the chaparral habitat. Its nitrogen fixation ability helps it thrive in rocky, sandy soil. The plant is also well-suited to a landscape of hills, slopes, and recently-burned areas; its roots spread quickly and help anchor loose soil, preventing erosion.
	Picket fence A picket fence is a variety of fence that has been used mostly for domestic boundaries. The style has been used since the First Period and remains popular in current times. Often the fence is painted white and made of wood, although modern versions may use plastic that resembles wood.
	Picket Fences Picket Fences was a 60-minute drama which ran from 1992 to 1996 on the CBS television network in the United States. Created by David E. Kelley, the show starred Tom Skerritt and Kathy Baker. The series followed the lives of the residents of the small town of Rome, Wisconsin, where weird things happened, including cows giving birth to human babies, transgender teachers, and a spate of people turning up dead in freezers.
	Pickle Barrel Pickle Barrel is a chain of Canadian deli style restaurants, that has been in business for over 30 years in the Greater Toronto Area. There are 9 locations in Southern Ontario.
	Pickup truck A pickup truck or pick-up is a light motor vehicle with an open-top rear cargo area. In North America, the word pickup generally refers to a small or medium sized truck, rather than vehicles based on passenger cars. This light commercial vehicle features a separate cabin and rear load area .
	Picnic In contemporary usage, picnic can be defined simply as a pleasure excursion at which a meal is eaten outdoors, ideally, taking place in a beautiful landscape. Picnics are often family-oriented but can also be an intimate occasion between two people, a romantic picnic, or a large get together, company picnics and church picnics.
	Pico de Orizaba Pico de Orizaba or Citlaltpetl, is the highest mountain in Mexico and the third highest in North America. It is located towards the eastern end of the Eje Volcnico Transversal mountain range, on the border between the states of Veracruz and Puebla. It is currently dormant but not extinct; the last eruptions occurred in 1687, with previous eruptions in 1630, 1613, 1569, 1566, 1545-1565? and 1537.
	Picoides Picoides is a genus of woodpeckers found primarily in North America. The plumage in most species is predominately black and white, brown and white in some southern species, with the male often having a red badge. Their bills are straight and chisel-shaped. Although in the four-toed species, the toes normally have a zygodactyl or yoked arrangement while on the ground, one toe can be rotated forward for climbing.
	Picot A picot is a loop of thread created for functional or ornamental purposes along the edge of lace, ribbon, Crochet, knitting or Tatting material. These loops vary in size, according to their intended function and to their creator's artistic intention. The word picot is pronounced [pe' ko].
	Picric acid Picric acid is the common term for the chemical compound 2,4,6-trinitrophenol, also known as TNP; the material is a yellow crystalline solid. Like other highly nitrated compounds , picric acid is an explosive. Modern safety precautions recommend storing picric acid wet.
	Picris Picris is a genus in the daisy family. References Category:Asteraceae de:Bitterkruter lt:Kartylis pt:Picris
	Picture book A picture book is a popular form of illustrated literature—more precisely, a book with comparatively few words and at least one picture on each of its openings—popularized in the 20th century Western world. The illustrations in picture books use a range of media from oil painting to collage to quilting, but are most commonly watercolor or pencil drawings.
	Pie A pie is a baked food, with a baked shell usually made of pastry that covers or completely contains a filling of meat, fish, vegetables, fruit, cheeses, cream, chocolate, custards, nuts, or other sweet or savoury ingredients. Pies can be either "one-crust," where the filling is placed in a dish and covered with a pastry/potato mash top before baking, or "two-crust," with the filling completely enclosed in the pastry shell.
	Pie chart A pie chart is a circle chart divided into sector, illustrating relative magnitude or frequencies. In a pie chart, the arc length of each sector, is proportionality to the quantity it represents. Together, the sectors create a full disk.
	Piebald A piebald is an animal, especially a horse, that has large white and black patches. The colour of the horse's skin underneath its coat may vary between black and pink. In the UK, it is typically considered a manifestation of the Tobiano gene, though in the United States the color scheme appears in both Overo and Tobiano individuals.
	Pied-billed Grebe The Pied-billed Grebe,, is a member of the grebe family of water birds. Since the Atitln Grebe, Podilymbus gigas, has become Extinction, it is the sole extant member of the genus Podilymbus. The Pied-billed Grebe breeds across Canada, parts of the United States, and temperate South America.
	Piedmont Piedmont is a Regions of Italy of northwestern Italy. It has an area of 25,399 km2 and a population of est. 4.3 million. Its capital is Turin. Piedmont is surrounded on three sides by the Alps mountain range, including the Monviso, where the Po River rises, and Monte Rosa.
	Pier A pier is a raised walkway over water, supported by widely spread piles or pillars. The lighter structure of a pier allows tides and currents to flow almost unhindered, whereas the more solid foundations of a quay or the closely-spaced piles of a wharf can act as breakwaters, and are consequently more liable to silting.
	Pier Luigi Nervi Pier Luigi Nervi was an Italy architect and engineer. He studied at the University of Bologna and qualified in 1913. He is renowned for his brilliance as a structural engineer and his novel use of reinforced concrete.
	Pieridae The Pieridae are a large family of butterfly. They are characterised by mainly white or yellow coloration, often with black spots. The sexes usually differ, often in the pattern or number of the black markings. The larvae of some of these species feed on brassicas, and are agricultural pests.
	Pierre Boulez Pierre Boulez is a composer and Conducting of European classical music.
	Pierre Charles L'Enfant Pierre Charles L'Enfant was a France-born United States architect and urban planner. L'Enfant designed the street plan of the Federal City in the United States, now known as Washington, D.C. He came to the Thirteen Colonies as a military engineer with General Marquis de la Fayette and became closely identified with the United States, adopting the name Peter.
	Pierre Corneille Pierre Corneille was a French tragedy who was one of the three great 17th Century French dramatists, along with Molire and Jean Racine. He has been called the founder of French tragedy and produced plays for nearly 40 years.
	Pierre Curie Pierre Curie was a France Physics and a pioneer in the study of crystallography, magnetism, piezoelectricity and radioactivity. Together with his Polish-French wife, Marie Curie, Pierre was awarded the Nobel Prize in physics in 1903:
	Pierre de Fermat Pierre de Fermat was a France lawyer at the Parlement of Toulouse, southwestern France, and a List of mathematicians who is given credit for his contribution towards the development of modern calculus. With his insightful theorems Fermat created the modern theory of numbers.
	Pierre Laporte Bridge The Pierre Laporte Bridge was originally named the New Quebec Bridge and was supposed to be called Pont Frontenac until it was renamed in honour of Quebec Vice-Premier Pierre Laporte who was kidnapped and murdered during the October Crisis of 1970. The Pierre Laporte bridge is the longest main span suspension bridge in Canada.
	Pierre Larousse Pierre Athanase Larousse was a France grammar and lexicography born in Toucy. At the age of sixteen he won a scholarship at the teaching school in Versailles. Four years later, he returned to Toucy to teach in a primary school, but became frustrated by the archaic and rigid teaching methods.
	Pierre Teilhard de Chardin Pierre Teilhard de Chardin was a France Society of Jesus priest trained as a Paleontology and a philosopher, and was present at the discovery of Peking Man. Teilhard conceived such ideas as the Omega Point and the Noosphere. Teilard's primary book, The Phenomenon of Man, set forth a sweeping account of the unfolding of the cosmos.
	Pierrot Pierrot is a stock character of pantomime. The French character named Pierrot is a creation of Jean-Gaspard Deburau, and is a variant on the Italian character Pedrolino. Spelled "Pjerrot," the character is a fixture at Bakken, the world's oldest amusement park. Bakken literature claims that the character is more than 4,000 years old, and originated in Turkey.
	Piet Mondrian Pieter Cornelis Mondriaan, after 1912 Mondrian,, Dutch painter Mondrian was an important contributor to the De Stijl art movement and group, which was founded by Theo van Doesburg. Despite being well-known, often-parodied and even trivialized, Mondrian's paintings exhibit a complexity that belies their apparent simplicity.
	Pietà Category:Christian iconography External links cs:Pieta da:Piet de:Piet fr:Piet it:Piet lb:Piet nl:Pita ja:??? pl:Piet ru:?? ????? ????, ???? sv:Piet tr:Piet
	Pietas In Roman mythology, Pietas was the goddess of duty to one's state, Deity and family. Pietas was also one of the Ancient Rome virtues, along with gravitas and dignitas. Pietas is usually translated as "duty" or "devotion," and it simultaneously suggests duty to the gods and duty to family.
	Pieter Brueghel the Elder Pieter Brueghel the Elder or Bruegel was a Flemings Dutch and Flemish Renaissance painting painter known for his landscapes and peasant scenes. There are records that he was born in Breda, Netherlands but it is uncertain whether the Netherlands town of Breda or the Belgium town of Bree, Belgium, called Breda in Latin, is meant.
	Pieter Zeeman Pieter Zeeman was a Netherlands physics who shared the 1902 Nobel Prize in Physics with Hendrik Lorentz for his discovery of the Zeeman effect.
	Piezoelectricity Piezoelectricity is the ability of crystals to generate a voltage in response to applied mechanical Stress . The word is derived from the Greek language piezein, which means to squeeze or press. The piezoelectric effect is reversible in that piezoelectric crystals, when subjected to an externally applied voltage, can change shape by a small amount.
	Pig Pigs are ungulates native to Eurasia collectively grouped under the genus Sus within the Suidae family. They have been Domestic pig and raised as livestock by some peoples for meat as well as for leather. Their bristly hairs are also traditionally used for brushes.
	Pig iron Pig iron is raw iron, the immediate product of smelting iron ore with coke and limestone in a blast furnace. Pig iron has a very high carbon content, typically 3.5%, which makes it very brittle and not useful directly as a material except for limited applications.
	Pigeon Guillemot The Pigeon Guillemot is a medium-sized Alcidae Endemism in birds to the Pacific. They closely resemble the other members of the genus Cepphus, particularly the Black Guillemot, which it is slightly larger than. Adult birds have black bodies with a white wing patch broken by a black wedge, a thin dark bill and red legs and feet.
	Pigeon pea The pigeon pea is a member of the family Fabaceae. Other common names are arhar, red gram, toovar, toor, togari, gandul, Congo pea, Gungo pea, and no-eye pea. The cultivation of the pigeon pea goes back at least 3000 years. The centre of origin is most likely Asia, from where it travelled to East Africa and by means of the slave trade to the American continent.
	Piggy bank Piggy bank is the traditional name of a coin accumulation and storage container, most often used by children. Piggy banks are often shaped like pigs and made of ceramic or porcelain. Piggy banks are used to reinforce ideas of savings and spending to children; money can be easily inserted, but the pig must be broken open for it to be retrieved, forcing the child to justify his or her decision.
	Pigment A pigment is a material that changes the color of light it reflects as the result of selective color absorption. This physical process differs from fluorescence, phosphorescence, and other forms of luminescence, in which the material itself emits light. Many materials selectively absorb certain wavelengths of light.
	Pigtails Please note that this article refers to pigtails as they relate to Hair. If you're looking for pigtail connectors, please refer to the Fiber Optics or Plug articles. Pigtails describe a hairstyle in which the hair is parted down in the middle and tied into two bundles, one on each side of the head.
	Pika The name pika is used for any member of the Ochotonidae, a Family within the order of Lagomorphas, which also includes the Leporidae . One genus, Ochotona, is recognised within the family, and it includes 30 species. Pikas are also called rock rabbits or coneys.
	Pilaf Pilaf, also spelled pilau, perloo, perlau, plaw, pilaw, and pilaff is a Middle East and Central Asia dish in which a grain, such as rice or cracked wheat, is generally first browned in oil, and then cooked in a seasoned broth.
	Pilaster In architecture, a pilaster comprises a slightly-projecting column built into or onto a wall, with a capital and base. Pilasters can be flat against a wall supporting a roof and may have a design.
	Pilates The Pilates Method is a physical fitness system that was developed in the early 20th century by Joseph Pilates. Pilates wrote at least two books about the Pilates method: Return to Life through Contrology and Your Health: A Corrective System of Exercising That Revolutionizes the Entire Field of Physical Education.
	Pile A pile is one type of building foundation. Piles are used when the soil near the ground surface is not strong and the weight of the building must be carried by deeper soil layers. The strength or bearing capacity of the soil can be measured using a cone penetration test.
	Pile driver The pile driver or piledriver is a term used to describe a mechanical device which converts potential energy and kinetic energy into mechanical energy. It is often used to force support struts into unstable terrain such as bay mud. This process allows for a structure to be built atop the piles.
	Pilea Pilea is a genus of about 600 annual and perennial plants, including many tropical specis but also some temperate plants and garden plants. Leaves are opposite, simple, with stipules. Stems are fleshy, generally glabrous, containing copious watery sap. Flowers are small and borne in axillary cymes or panicles, greenish white or yellowish, lacking petals.
	Pilgrimage Media:Example.oggA pilgrimage is a term primarily used in religion and spirituality of a long Quest or search of great moral significance. Sometimes, it is a journey to a sacred place or shrine of importance to a person's beliefs and faith. Members of every religion participate in pilgrimages.
	Pilgrims Pilgrims or Pilgrim Fathers is the name commonly applied to early settlers of the Plymouth Colony. Their leadership came from a religious congregation who had fled a volatile political environment in the East Midlands of England for the relative calm of Holland in the Netherlands.
	Pillars of Hercules The Pillars of Hercules is the ancient name given to the promontory that flank the entrance to the Strait of Gibraltar. They are Gibraltar in Europe and Monte Hacho in Ceuta in Africa. The Jebel Musa, Morocco, west of Ceuta, in Morocco, is sometimes considered one of the Pillars.
	Pillory The pillory was a device used in punishment by public humiliation and often additional, sometimes physically painful, abuse. The word is documented in English since 1274, and stems from Old French pellori, itself from Medieval Latin pilloria, of uncertain origin, perhaps a diminutive of Latin pila "pillar, stone barrier."