Rhinoceros beetle The rhinoceros beetles are a subfamily of beetles in the family of scarab beetles. They are among the largest of beetles, so named because of the characteristic horns borne by the males of most species in the group. The male beetles use their horns in mating battles against other males.
	Rhipsalis Rhipsalis is a genus of epiphyte, mostly spineless cactus. The genus is found widely in Central America, parts of the Caribbean and a great part of northern and central South America. One particular species, Rhipsalis baccifera, is also found throughout the range in the New World, but also in Africa, Madagascar, Sri Lanka, India and Nepal.
	Rhizome A rhizome is, in botany, a usually underground, horizontal plant stem of a plant that often sends out roots and shoots from its nodes. Rhizomes may also be referred to as creeping rootstalks, or rootstocks. A stolon is similar to a rhizome, but exists above ground, sprouting from an existing stem.
	Rhizophora Rhizophora is a genus of tropical trees. The most notable species is the Red mangrove. Rhizophora generally lives in inter-tidal areas which are indundated daily by the tides. They have a number of adaptations suited to this environment, namely propagules that allow them to breath in the anaerobic environment.
	Rhizophora mangle Rhizophora mangle, known as the red mangrove, is distributed in estuarine ecosystems throughout the tropics. Its viviparous seeds, which are dispersed by water, sprout while they are still on the parent plant, growing a tough green root that makes them unmistakable. R. mangle grows on prop roots, which arch above the water level, giving stands of this tree the characteristic "mangrove" appearance.
	Rhizophoraceae Rhizophoraceae is a family constituted by tropical or subtropical flowering plants. Among the better known members are mangrove trees of the genus Rhizophora. There are around 120 species distributed in sixteen genus, most native to the Old World.
	Rhodanthe Rhodanthe is a genus of flowering plants within the daisy family Asteraceae. The name Rhodanthe is derived from Greek language rhodon, rose and anthos, flower. Many Rhodanthe species were formerly classed under different genera, including Helipterum, Podotheca, Acroclinium and Waitzia.
	Rhode Island The State of Rhode Island and Providence Plantations is the smallest U.S. state by land area in the United States, and the state with the longest official name. Rhode Island is part of the New England region , and was the first of the Thirteen colonies to Declaration of Independence from British rule, signaling the start of the American Revolution.
	Rhode Island Red The Rhode Island Red (Gallus gallus) is a very popular breed of chicken. They are a utility bird, raised for meat and Egg, and also as show birds.
	Rhodes Rhodes, is the largest of the Dodecanese islands, and easternmost of the major islands of Greece in the Aegean Sea. It lies approximately 11 miles west of Turkey, situated between the Greek mainland and the island of Cyprus. Its population in 2004 was 110,000 , of which between 55,000 and 60,000 resided permanently in the Rhodes, Greece, the main commercial and population center.
	Rhodesia Rhodesia was the name of the British Empire colony of Southern Rhodesia after 1965. Landlocked and located in southern Africa, it was governed by white minority rule until 1979. The colony was named after Cecil Rhodes, whose British South Africa Company acquired the land in the nineteenth century.
	Rhodesian Man Rhodesian Man, frequently classified as Homo rhodesiensis is a hominin fossil that was described from a cranium found in an iron and zinc mine in Northern Rhodesia in 1921 by Tom Zwiglaar, a Swiss Mining. In addition to the cranium, an upper jaw from another individual, a sacrum, a tibia, and two femur fragments were also found.
	Rhodesian Ridgeback akcgroup = Hound | akcstd = altname= African Lion DogAfrican Lion Hound | ankcgroup = Group 4 | ankcstd = ckcgroup = Group 2 - Hounds | ckcstd = country = southern Africa | fcigroup = 6 | fcinum = 146 | fcisection = 3 | fcistd = image = Rhodesian Ridgeback 600.jpg | image_caption = The Rhodesian Ridgeback is the only breed besides the Thai Ridgeback and the Africanis of South Africa with a ridge of fur along the spine.
	Rhodium Rh redirects here. For other uses, see rh Rhodium is a chemical element in the periodic table that has the symbol Rh and atomic number 45. A rare silvery-white hard transition metal, rhodium is a member of the platinum group, is found in platinum ores and is used in alloys with platinum and as a catalyst.
	Rhodochrosite Rhodochrosite is a manganese carbonate mineral with chemical composition Manganese(II) carbonate. In its pure form, it is typically a rose-red colour, but impure specimens can be shades of pink to pale brown. The streak is white. Its Mohs hardness varies between 3.5 and 4.
	Rhododendron Rhododendron is a genus of flowering plants in the family Ericaceae. It is a large genus with over 800 species. They may be either evergreen or deciduous, and most have showy flower displays. It includes the plants known to gardeners as azalea. The species are organised by subgenus, section, subsection and series.
	Rhodonite Rhodonite is a member of the pyroxene group of minerals, consisting of manganese Silicate minerals, SiO3, and crystallizing in the triclinic system. It commonly occurs as cleavable to compact masses with a rose-red color, often tending to brown because of surface redox.
	Rhodope Mountains The Rhodopes are a mountain range in Southeastern Europe, with over 83% of its area in southern Bulgaria and the remainder in Greece. Its highest peak, Golyam Perelik, is the seventh highest Bulgarian mountain. The region is particularly notable for the Karst areas with their deep river gorges, large caves and specific sculptured forms, such as the Trigrad Gorge.
	Rhodopsin Rhodopsin, also known as visual purple, is expressed in vertebrate photoreceptor cells. It is a pigment of the retina that is responsible for both the formation of the photoreceptor cells and the first events in the perception of light. Rhodopsins belong to the class of G-protein coupled receptors.
	Rhombohedron In geometry, a rhombohedron is a three-dimensional figure like a cube, except that its faces are not squares but rhombus. It is a special case of a parallelepiped where all edges are the same length. In general the rhombohedron can have three types of rhombus faces in congruent opposite pairs.
	Rhomboid In geometry, a rhomboid is a parallelogram in which adjacent sides are of unequal lengths and angles are oblique. A shape like a rhomboid with sides of equal length is a rhombus. A shape like a rhomboid with right angled corners is a rectangle. The word Rhomboid which means rhom-like was commonly used in the 19th century for a parallelogram which was neither a rectangle nor a rhombus.
	Rhombus In geometry, a rhombus is a quadrilateral in which all of the sides are of equal length, i.e., it is an equilateral quadrangle. In colloquial usage the shape is often described as a diamond or lozenge. In any rhombus, opposite sides will be parallel. Thus, the rhombus is a special case of the parallelogram.
	Rhône River The River Rhne, is one of the major rivers of Europe, running through Switzerland and France.
	Rhubarb Rhubarb is a perennial plant that grows from thick short rhizomes, comprising the genus Rheum. The large, somewhat triangular leaf blades are elevated on long, fleshy petioles. The flowers are small, greenish-white, and borne in large compound leafy inflorescences.
	Rhubarb pie Rhubarb pie was originally known as a savory type of pie, and is particularly popular in areas where the plant is cultivated. Besides diced rhubarb, it almost always contains a large amount of sugar. In the United States, rhubarb pie has generally been eclipsed by its Midwestern sister, the strawberry-rhubarb pie.
	Rhumb line In navigation, a rhumb line is a line crossing all meridians at the same angle, i.e. a path of constant bearing. The idea of a loxodrome was invented by a Portuguese Mathematician Pedro Nunes in the 1500s. If you follow a given compass-bearing on Earth, you will be following a rhumb line, which spirals from one Geographical pole to the other, with the exception of 90 and 270 degrees, lines of constant latitude, e.g.
	Rhus glabra Rhus glabra is a species of sumac in the family Anacardiaceae, native to North America, from southern Quebec west to southern British Columbia in Canada, and south to northern Florida and Arizona in the United States and Tamaulipas in northeastern Mexico.
	Rhus typhina Staghorn Sumac, is a deciduous shrub to small tree in the Anacardiaceae or Cashew family, native to eastern North America, from Ontario and Quebec south to northern Georgia and Mississippi [1]. It grows to 3-10 m tall, and has alternate, pinnately compound leaf 25-55 cm long, each with 9-31 serrate leaflets 6-11 cm long [2].
	Rhyolite This page is about a volcanic rock. For the satellite system, see Rhyolite/Aquacade. Rhyolite is an igneous rock, volcanic rock , of felsic composition . It may have any texture from aphanitic to porphyritic. The mineral assemblage is usually quartz, alkali feldspar and plagioclase .
	Rhythm and blues Rhythm and blues is a popular music genre combining jazz, gospel music, and blues influences first performed by African American artists. The term was coined as a musical marketing term in the United States in 1949 by Jerry Wexler at Billboard magazine.
	Rhythm Method The Rhythm Method, also known as the Calendar Method or the Knaus-Ogino Method , is a method of natural birth control birth control that involves counting days of a woman's menstrual cycle in order to achieve or avoid pregnancy. A recently developed variant of the Rhythm Method is known as the Standard Days Method.
	Rib In anatomy, ribs are the long curved bones which form the rib cage. Ribs surround the chest of land vertebrates, and protect the lungs, heart, and other internal Organ s of the thoracic cavity. In mammals, one generally thinks of ribs occurring only in the chest.
	Ribavirin Ribavirin is an anti-viral drug which is active against a number of DNA and RNA viruses. It is a member of the nucleoside antimetabolite drugs that interfere with duplication of viral genetic material. Though not effective against all viruses, ribavirin is remarkable as a small molecule for its wide range of activity, including important activities against influenzas, flaviviruses and agents of many viral hemorrhagic fevers.
	Ribbed Ribbed is the third studio album by NOFX, it was released on March 26, 1991.
	Ribbon A ribbon is a thin band of flexible material, typically cloth but also plastic or sometimes metal, used primarily for binding and tying. Cloth ribbons, which most commonly includes silk, are often used in connection with dress, but also applied for innumerable useful, ornamental and symbolical purposes; cultures around the world use this device in their hair, around the body, or even as ornamentation on animals, buildings, and other areas.
	Ribbonfish The ribbonfishes are a family, Trachipteridae, of marine fishes. These pelagic fishes are named for their slim, ribbon-like appearance. They are rarely seen alive as they typically live in deep waters. They are readily recognized by their Fish anatomy: a long, compressed, tape-like body, short head, narrow mouth and feeble teeth.
	Ribes Ribes is a genus of about 150 species of flowering plants, usually treated as the only genus in the family Grossulariaceae. The genus is native throughout the temperate regions of the Northern Hemisphere. Ribes includes the currants, including the edible currants, gooseberry, and many ornamental plants.
	Ribes sanguineum Ribes sanguineum is a species of Ribes native to western coastal North America from central British Columbia south to central California. It is a deciduous shrub growing to 4 m tall. The bark is dark brownish-grey with prominent paler brown lenticels.
	Riboflavin Riboflavin , also known as vitamin B2 or vitamin G, is an easily absorbed, water-soluble micronutrient with a key role in maintaining human health. Like the other B vitamins, it supports energy production by aiding in the metabolism of fats, carbohydrates, and proteins.
	Ribonuclease Ribonuclease, abbreviated commonly as RNase, is an nuclease that catalysis the breakdown of RNA into smaller components. They can be divided into endonucleases and exonucleases, and comprise several sub-classes within the EC 3.1 class of enzymes. RNases are extremely common, resulting in very short lifespans for any RNA that is not in a protected environment.
	Ribose Ribose, primarily seen as D-ribose, is an aldopentose — a monosaccharide containing five carbon atoms, and including an aldehyde functional group in its linear form. It has the chemical formula 5105, and was discovered in 1905 by Phoebus Levene.
	Ribosome A ribosome is an organelle composed of ribosomal RNA and ribosomal proteins . It translation mRNA into a polypeptide chain . It can be thought of as a factory that builds a protein from a set of genetic instructions. Ribosomes can float freely in the cytoplasm or bind to the endoplasmic reticulum, or to the nuclear envelope.
	Rice Rice refers to two species of Poaceae, native to tropical and subtropical southern & southeastern Asia and to Africa, which together provide more than one fifth of the calories consumed by humans. Rice is an annual plant, growing to 11.8 m tall, occasionally more, with long slender leaf 50100 cm long and 22.5 cm broad.
	Rice rat The rice rats are various species in the Oryzomyini tribe of New World rats and mice. When trying to give the rice rats a monophyletic meaning, the term is usually used to refer to the species of the Oryzomys genus. However species from other genera in the tribe, including Nesoryzomys, Oecomys, Melanomys, Oligoryzomys and Microryzomys have "rice rat" in their common names so it is usual now to think of the rice rats as a vernacular term for a paraphyletic grouping of
	Richard August Carl Emil Erlenmeyer Category:German chemists Category:1825 births Category:1909 deaths de:Emil Erlenmeyer es:Richard August Carl Emil Erlenmeyer fr:Emil Erlenmeyer pt:Emil Erlenmeyer
	Richard Brinsley Sheridan Richard Brinsley Sheridan was an Ireland playwright and British Whig Party statesman. In Gaelic, his name would be Ricaere Brunshilhe Cheridennne. Sheridan was born in Dublin on October 30, 1751 at 12 Dorset Street, a fashionable street in the late eighteenth century..
	Richard Burbage Sir Richard Burbage was an actor and theatre owner. Younger Brother of Cuthbert Burbage. Burbage came from an acting family and was a popular performer by the age of 20. After the death of his father James Burbage around 1598, Richard and his brother Cuthbert stepped in to rescue the family's interests in two London theatres, then tied up in lawsuits.
	Richard Burton Richard Burton Order of the British Empire was a Wales actor. He is often considered to be one of the greatest British actors of all time and at one time was the highest paid actor in Hollywood. Known for his immaculate vocal style, was nominated 7 times for Best Actor Oscars.
	Richard D'Oyly Carte Richard D'Oyly Carte was an England theatrical impresario during the latter half of the nineteenth century. He is best known for producing the Savoy opera of Gilbert and Sullivan, founding the D'Oyly Carte Opera Company, and building both the Savoy Theatre and the Savoy Hotel.
	Richard Evelyn Byrd Rear Admiral Richard Evelyn Byrd, United States Navy was a pioneering United States polar explorer and famous aviator.
	Richard Feynman Richard Phillips Feynman was an influential United States physicist known for expanding greatly on the theory of quantum electrodynamics, particle theory, and the physics of the superfluidity of supercooled liquid helium. For his work on quantum electrodynamics, Feynman was one of the recipients of the Nobel Prize in Physics in 1965, along with Julian Schwinger and Shin-Ichiro Tomonaga; in this work, he developed a way to understand the behavior of subatomic particles using pictorial tools n
	Richard Henry Lee Richard Henry Lee was an United States who served as the sixth President of the United States in Congress assembled under the Articles of Confederation, holding office from November 30, 1784 to November 22, 1785. He was preceded in office by Thomas Mifflin and succeeded by John Hancock.
	Richard Jordan Gatling Dr. Richard Jordan Gatling was an American inventor best known for his invention of the Gatling gun, the first successful rapid-repeating fire arm. The son of farmer and inventor Jordan Gatling, Gatling was born in Hertford County, North Carolina and by the age of 21 had invented the screw propeller for steamboats, only to discover it had recently and independently been patented by John Ericsson.
	Richard Kuhn Richard Kuhn was an Austrian-Germany Biochemistry and Nobel Prize winner.
	Richard Leakey Richard Erskine Frere Leakey, is a paleontology, archaeology and conservationist. He is the second of the three sons of the archaeologists Louis Leakey and Mary Leakey. A high school drop-out, Leakey discovered his love of paleontology when he led an expedition to a fossil site he had discovered while flying.
	Richard Lovelace Richard Lovelace was an England poet and nobleman, born in Lovelace Place, Bethersden , Kent. He was one of the Cavalier poets, and a noted Charles I of England. The "Lucasta" to whom he dedicated much of his verse was Lucy Sacheverell, whom he often called Lux Casta.
	Richard Morris Hunt Richard Morris Hunt preeminent figure in the history of American architecture. In 1846 Hunt was the first American architect to attend the cole des Beaux-Arts in Paris, and was regarded well enough to supervise work on the Louvre under Napoleon III. After his return in 1855, he founded the first American architectural school at his Tenth Street Studio, co-founded the American Institute of Architects and became its President in 1888, brought the first apartment building to Manhattan in a burst of scandal, and set
	Richard Nixon Richard Milhous Nixon was the 37th President of the United States, serving from 1969 to 1974. He was the only American President to have resigned from office. His resignation came in the face of imminent impeachment related to the Watergate scandal, which encompassed numerous crimes and misconduct beginning with the Watergate first break-in, the follow-up burglary, and the cover-up.
	Richard Rodgers Richard Charles Rodgers was one of the great composers of musical theater, best known for his song writing partnerships with Lorenz Hart and Oscar Hammerstein II. He wrote more than 900 published songs, and forty Broadway theatre musicals. Many of his compositions continue to have a broad appeal and have had a significant impact on the development of popular music.
	Richard Smalley Richard Errett Smalley was the Gene and Norman Hackerman Professor of Chemistry and a Professor of Physics and Astronomy at Rice University, in Houston, Texas. He was awarded the Nobel Prize in Chemistry in 1996 for the discovery of a new form of carbon, buckminsterfullerene .
	Richard Strauss Richard Strauss was a Germany composer of the late Romantic music era, particularly noted for his tone poems and operas. He was also a noted Conducting.
	Richard Trevithick Richard Trevithick was born on 13 April 1771 at the village of Illogan, between Camborne and Redruth in the heart of one of the rich mineral mining areas of Cornwall, United Kingdom. He died on 22 April 1833 at Dartford, Kent. He was an Cornish people inventor, engineer and builder of the world's first working steam locomotive.
	Richard Upjohn Richard Upjohn was a United States architect. Originally from England, he was accustomed to working in the Gothic Revival style, and is responsible for launching the movement to such popularity in the United States. Works include St. Mary's Episcopal church in Burlington, New Jersey, Church of the Ascension and Trinity Church, New York in New York City, Kingscote, Rhode Island in Newport, RI, the former Bristol Academy building in Taunton, Massachusetts
	Richard Wagner Wilhelm Richard Wagner was an influential Germany composer, Conducting, music theory, and essayist, primarily known for his operas . His compositions, particularly those of his later period, are notable for their contrapuntal texture , rich chromaticism, harmony and orchestration, and elaborate use of leitmotifs: themes associated with specific characters, locales, or plot elements.
	Ricin The protein ricin is a toxin from the castor bean. Ricin can be extraction from castor beans and is known to have an average lethal dose in humans of 1 E-7 kg, though some sources give higher figures symptom and supportive treatment is available.
	Rickenbacker Rickenbacker is an electric guitar manufacturer. All production takes place at its headquarters in Santa Ana, California. Rickenbacker is the largest guitar company to manufacture all of their guitars within the United States.
	Rickets Osteomalacia, also known as rickets , is among the most frequent childhood diseases in developing countries. The predominant cause is a vitamin D deficiency, but lack of adequate calcium in the diet may also lead to rickets. Although it can occur in adults, the majority of cases occur in children suffering from severe malnutrition, usually resulting from famine or starvation during the early stages of childhood.
	Rickshaw Rickshaws are a mode of human-powered transport: a runner draws a two-wheeled cart which seats one or two persons. Rickshaws were mainly used in Asia, but nowadays they are outlawed in many places and have been replaced by cycle rickshaws and auto rickshaws. The term "rickshaw" is today commonly used for those vehicles as well, but this article deals exclusively with runner-pulled rickshaws.
	Riddled "Riddled" is the second episode of The Batman's List of The Batman episodes#Season Two. It originally aired in North America on May 21, 2005.
	Riding habit A riding habit is women's clothing for horseback riding. Since the mid-17th century, a formal habit for riding sidesaddle usually consisted of: * A tailored jacket with a long skirt and dress to match * A tailored shirt or chemisette * A hat, often in the most formal men's style of the day