Dimension In common usage, a dimension is a parameter or measurement required to define the characteristics of an object—i.e. length, width, and height or size and shape. In mathematics, dimensions are the parameters required to describe the position and relevant characteristics of any object within a conceptual space —where the dimensions of a space are the total number of different parameters used for all possible objects considered in the model .
	Dimer A dimer is a chemical or biological entity consisting of two subunits called monomers, which are held together by either intramolecular forces (covalent bonds) or weaker intermolecular forces.
	Dimethylglyoxime | Dimethylglyoxime |- | align="center" colspan="2" | |- ! | General |- | IUPAC nomenclature | 2,3-Butanedione Dioxime |- | Other names | Dimethylglyoxime, Diacetyl dioxime, Chugaev's Reagent |- | Chemical formula | C4H8N2O2
	Dimetrodon Dimetrodon was a predatory synapsid genus that flourished during the Permian Period, living between 280 and 260 million years ago. It was more closely related to mammals than to true reptiles, like dinosaurs, lizards and birds. Dimetrodon was not a dinosaur, despite being popularly grouped with them.
	Dimmer (ETC)]] Dimmers are devices used to vary the brightness of a light. By decreasing or increasing the root mean square voltage and hence the arithmetic mean power to the lamp it is possible to vary the intensity of the light output. Although variable-voltage devices are used for various purposes, the term dimmer is generally reserved for those intended to control lighting.
	Dimocarpus Dimocarpus is a genus of about 20 species of flowering plants in the soapberry family Sapindaceae, native to tropical southeast Asia and northern Australasia, from Sri Lanka and southern China south to northern Queensland. The fruit is edible, with the Longan being grown commercially for fruit production.
	Dimple Dimples are visible indentations of the skin, caused by underlying flesh, which form on some people's cheeks when they smile. Dimples are genetically inherited and are a dominant trait . Dimples on each cheek are a relatively common occurrence for people with dimples. A rarer form is the single dimple, which occurs on one side of the face only.
	Dinar The dinar is the currency unit of various countries, most of them Arabic language-speaking or once part of the Ottoman Empire. The word "dinar" is derived from denarius, a Roman currency.
	Diner A diner is a prefabricated restaurant building characteristic of North America, especially in New Jersey, Long Island, and other areas of the Northeastern United States. Some people apply the term not only to the prefabricated structures, but also to restaurants that serve cuisine similar to traditional diner cuisine even if they are located in more traditional types of buildings; other people do not acknowledge this as correct usage.
	Dingbat A dingbat is an ornament or spacer used in typesetting, sometimes more formally known as a "printer's ornament". The term supposedly originated as onomatopoeia in old style metal-type print shops, where extra space around text or illustrations would be filled by "ding"ing an ornament into the space then "bat"ing tight to be ready for inking.
	Dinghy A dinghy is a small utility boat attached to a larger boat. Dinghies are usually rowboats or have a small outboard motor while others may use a small sailing rig. They are necessary for any off-ship excursions from larger boats, outside of Dock at suitably-sized ports or marinas.
	Dingle Dingle is a growing town in County Kerry in the Republic of Ireland, on the Atlantic Ocean coast some 50 km west-south-west of Tralee and 80 km west-north-west of Killarney. The town is situated on a natural harbour below Slievanea mountain on the large Dingle peninsula, which lies south of the River Shannon and north of the Ring of Kerry.
	Dingo |- style = "text-align:center" |style="background: pink;" |Breed standards |- style = "text-align:center" | |} The dingo , Canis lupus dingo, is a type of wild dog, probably descended from the Indian Wolf . It is commonly described as an Australian wild dog, but is not restricted to Australia, nor did it originate there.
	Dining car A dining car or diner is a railroad passenger car that serves meals on a train in the manner of a full-service, sit-down restaurant. It is distinct from other types of railroad food service cars that do not duplicate the full-service restaurant experience, principally cars of various types in which one purchases food from a walk-up counter to be consumed either within the car or elsewhere in the train.
	Dining room A dining room is a room for eating. It is usually adjacent to the kitchen for convenience in serving.
	Dinka The Dinka are a group of tribes of south Sudan, inhabiting the swamplands of the Bahr el Ghazal region of the Nile basin, Jonglei and parts of southern Kordufan and Upper Nile regions. They are mainly pastoral people, relying on cattle herding at riverside camps in the dry season and growing millet in fixed settlements during the rainy season.
	Dinner Dinner is the main meal of a day, normally cooked food consisting of animal proteins and starch products like rice, noodles or potatoes. The word dinner comes from the french word diner, which means the chief meal of the day. Dinner can also mean a more sophisticated meal like a banquet.
	Dinocerata Dinocerata, the so called "terrible horned" mammals, are an extinct order of herbivore, rhinoceros-like hoofed creatures famous for their paired horns and tusk-like canine teeth. The earliest dinoceratan, Prodinoceras, first appeared in Asia during the Paleocene, but nearly all later types are from North America.
	Dinoflagellate The dinoflagellates are a large group of flagellate protists. Most are marine plankton, but they are common in fresh water habitats as well; their populations are distributed depending on sea surface temperature, salinity, or depth. About half of all dinoflagellates are photosynthesis, and these make up the largest group of eukaryote algae aside from the diatoms.
	Dinosaur Dinosaurs were vertebrate animals that dominated Landform ecosystems for over 160 million years, first appearing approximately 230 million years ago. At the end of the Cretaceous Period , 65 million years ago, dinosaurs suffered a catastrophic extinction, which ended their dominance on land.
	DINOSAUR DINOSAUR is a thrill ride at Disney's Animal Kingdom in Walt Disney World, Lake Buena Vista, Florida. It is a rough dark ride. Guests are taken through primeval scenes populated with audio-animatronic dinosaurs. The ride is loosely related to the Dinosaur; originally named Countdown to Extinction, the ride's name was changed to fit the movie, but no significant changes were made to the ride itself.
	Diocese In some Christian churches, the diocese is an administrative territorial unit administrated by a bishop, hence also referred to as a bishopric or episcopal see, though more often the term episcopal see means the office held by the bishop. The diocese is the key unit of authority in the form of church governance known as episcopal polity.
	Diocletian Gaius Aurelius Valerius Diocletianus , born ??????? and known in English as Diocletian, was Roman Emperor from November 20 284 to May 1 305. Diocletian brought to an end the period popularly known to historians as the "Crisis of the Third Century" . He established an autocratic government and was responsible for laying the groundwork for the second phase of the Roman Empire, which is known variously as the "Dominate" , the "Tetrarchy", or simply the "Later Roman Empire".
	Diode In electronics, a diode is a Electronic components that restricts the direction of movement of charge carriers. Essentially, it allows an electric current to flow in one direction, but blocks it in the opposite direction. Thus, the diode can be thought of as an electronic version of a check valve.
	Dionysus Dionysus and Dionysos or Dionysius , the Thracian god of wine, represents not only the intoxicating power of wine, but also its social and beneficial influences. He is viewed as the promoter of civilization, a lawgiver, and lover of peace as well as the patron deity of both agriculture and the theater.
	Dioon Dioon is a plant genus of 11 described species. They are cycads in the family Zamiaceae, and native to Mexico, Honduras, and Nicaragua. Their habitats include tropical forests, pine-oak forest, and dry hillsides, canyons and coastal dunes. Dioons are dioecious, palm treelike shrubs with cylindrical stems, usually with many leaves.
	Diophantus Diophantus of Alexandria was a Hellenistic civilization Greek mathematics. Little is known of his life except that he lived in Alexandria, Egypt and worked in the Greek mathematics tradition of mathematics, principally on number theory.
	Diorama A diorama is a partially three dimensional full-size replica or scale model of a landscape typically showing historical events, nature scenes, cityscapes, etc. for purposes of education or entertainment. The term was coined by Louis Daguerre in 1822, for a kind of rotating display. Frank M. Chapman, a curator at the American Museum of Natural History during the late 19th and early 20th century, helped popularize the style commonly seen today.
	Diorite Diorite is a grey to dark grey intermediate Intrusion igneous rock composed principally of plagioclase feldspar, hornblende, and/or pyroxene. It can also be black or bluish-grey, and frequently has a greenish cast. Varieties deficient in hornblende and other dark minerals are called leucodiorite.
	Dioscoreaceae Dioscoreaceae is a botanical name of a family of flowering plants. Such a family has been recognized by most taxonomists. The APG II system, of 2003, also recognizes this family and places it in the order Dioscoreales, in the clade monocots. This is unchanged from the APG system, of 1998.
	Diospyros Diospyros is a genus of about 450-500 species of deciduous and evergreen trees. The majority are native to the tropics, with only a few species extending into temperate climates. The genus includes species of commercial importance, either for their edible fruit or for their timber.
	Diospyros virginiana Diospyros virginiana, the American persimmon, is a tree native to the Eastern United States. Its ranges from New England to Florida, and west to Texas and Kansas. The tree grows wild but has been cultivated for its fruit and wood since 1629. D. virginiana grows to 20 meters, in well-drained soil.
	Dioxin Dioxin is the popular name for the family of organohalogen, the most common consisting of polychlorinated dibenzofurans and polychlorinated dibenzodioxins . PCDD/Fs have been shown to bioaccumulate in humans and wildlife due to their lipophilic properties.
	DIP switch A DIP switch is an Switch that is packaged in a group in a standard dual in-line package. This type of switch is designed to be used on a printed circuit board along with other electronics components and is commonly used to customize the behavior of an electronic device for specific situations.
	Diphenhydramine Diphenhydramine hydrochloride is an Over-the-counter substance antihistamine and sedative. It is also given in conjunction with typical antipsychotics to prevent akathisia. It is a member of the ethanolamine class of antihistaminergic agents. Diphenhydramine is widely used in over-the-counter sleep aids with a 50mg recommended dose mandated by the FDA.
	Diphtheria Diphtheria , Greek for leather, , is an upper Respiration tract illness characterized by sore throat, low-grade fever, and an adherent membrane on the tonsil, pharynx, and/or nose. A milder form of diphtheria can be limited to the skin. It is caused by Corynebacterium diphtheriae, an aerobic Gram-positive bacterium.
	Diplodocus Diplodocus is a genus of a diplodocid sauropod dinosaur which lived in what is now western North America at the end of the Jurassic Period . The generic name is in reference to its double-beamed chevron . Diplodocus, a herbivorous Sauropoda dinosaur, was one of the more common dinosaurs found in the Upper Morrison Formation, about 150 to 147 Ma, in an environment and time dominated by giant sauropods , such as Camarasaurus,
	Diplomacy Diplomacy is the art and practice of conducting negotiations between representatives of groups or nations. It usually refers to international diplomacy, the conduct of international relations through the intercession of professional diplomats with regard to issues of peace-making, culture, economics, trade, and war.
	Diplomatic immunity Diplomatic immunity is a form of legal immunity and a policy held between governments, which ensures that diplomats are given safe passage and are considered not susceptible to lawsuit or prosecution under the host country's laws . It was agreed as international law in the Vienna Convention on Diplomatic Relations , though there is a much longer history in international law.
	Diplomatic mission A diplomatic mission is a group of people from one state or an international inter-governmental organization present in another state to represent the sending state/organization in the receiving state. In practice, a diplomatic mission usually denotes the permanent mission, namely the office of a country's diplomatic representatives in the capital city of another country.
	Dipole Definition In physics, there are two kinds of dipoles = double and polos = pivot). An electric dipole is a separation of positive and negative charge. The simplest example of this is a pair of electric charges of equal magnitude but opposite sign, separated by some, usually small, distance.
	Dipole antenna A dipole antenna, invented by Heinrich Rudolph Hertz around 1886, is an Antenna with a center-Input driven element for transmitting or receiving radio frequency energy. These antennas are the simplest practical antennas from a theoretical point of view.
	Dipper Dippers are members of the genus Cinclus in the bird family Cinclidae. They are a group of perching birds whose habitat includes aquatic environments in the Americas, Europe, and Asia. They are named for their bobbing or dipping movements. Usually they inhabit the banks of fast-moving hillside rivers, though some nest near shallow lakes.
	Dipsacaceae The Dipsacaceae, or teasel family, of the order Dipsacales contains 350 species of perennial or biennial herbs and shrubs in eleven genera. Native to most temperate climates, they are found in Europe, Asia and Africa. Some species of this family have been naturalized in other places.
	Dipsacus Dipsacus is a genus of flowering plant in the family Dipsacaceae. The members of this genus are known as teasel or teazel or teazle. The genus includes about 15 species of tall herbaceous biennial plants growing to 1-2.5 m tall, native to Europe, Asia and northern Africa.
	Diptera Diptera , or true flies, is the Order_ of insects possessing only a single pair of insect wings on the mesothorax; the metathorax bears a pair of drumstick like structures called the halteres, the remnants of the hind insect wings. It is a large order, containing an estimated 200,000 species, although under half of these have been described.
	Dipteryx Dipteryx is a genus of nine species of shrubs and trees in the subfamily Faboideae of the pea family Fabaceae, native to South America and Central America and the Caribbean. The Tonka bean is grown for its fragrant seeds, and several species are used for timber.
	Diptych es:Dptico fr:Diptyque it:Dittico pl:Dyptyk
	Dirca Dirca is a genus of three species of flowering plants in the family Thymelaeaceae, native to North America. The genus is named after Dirce in Greek mythology. The general common name of this shrub is Leatherwood; others include moosewood, ropebark and wicopy. There are three species in the genus, all deciduous shrubs.
	Dire Straits Dire Straits was a United Kingdom rock and roll, formed in 1977 by David Knopfler, his brother Mark Knopfler, John Illsley, and Pick Withers, and managed by Ed Bicknell. Although the band was formed in an era when punk rock reigned, Dire Straits worked within the conventions of classic rock, albeit with a stripped-down sound that appealed to modern audiences weary of the overproduced stadium rock of the 1970s.
	Direct current Direct current is the constant flow of electrons from low to high electric potential. This is typically in a Conductor such as a wire, but can also be through semiconductor, insulator, or even through a vacuum as in Electron_beam.
	Direct marketing Direct marketing is a discipline within marketing that involves the planned recording, analysis and tracking of individual customers' responses and transactions for the purpose of developing and prolonging mutually profitable customer relationships. The term was coined in the 1970s by Lester Wunderman, who pioneered direct marketing techniques with brands such as Amex and Columbia Records.
	Directional antenna A directional antenna is an antenna which transmits or receives maximum power in a particular direction. All practical antennas are at least somewhat directional, although usually only the direction in the plane parallel to the earth is considered, and practical antennas can easily be omnidirectional antenna in one plane.
	Directory The term directory may refer to:
	Dirndl A dirndl is a type of traditional dress worn in southern Germany and Austria, based on the historical costume of the Alpine peasants. It became popular in Austria as a fashionable dress among the upper classes between 1870 and 1880.
	Dirty Dirty is an album by Sonic Youth that was originally released on July 21 1992. On March 25 2003, a double-CD deluxe edition of the album was released. It comprised the original album with additional B-sides, demos and rehearsal recordings.
	Dirty War Dirty War refers to a program of a state-sponsored war on domestic citizens in response to strikes, social unrest, violence or subversion that is claimed to threaten a country's stability. In particular, it refers to the state-sponsored violence against dissident citizens carried out between 1976 and 1983 by Jorge Rafael Videla's military government in Argentina.
	Disa Disa is the heroine of a Swedish legendary saga, which was documented by Olaus Magnus, in 1555. It is believed to be from the Middle Ages, but including Old Norse matters. It was elaborated by Johannes Messenius in his drama Disa, which was the first historic play in the Swedish language, and was played at the Disting of 1611.
	Disability Bold text Disability refers to the social effects of physical, emotional or mental impairment. This definition, known as the 'social model' of disability, makes a clear distinction between the impairment itself and the disabling effects of society in relation to that impairment. As Frank Bowe put it in Handicapping America , the real issue is the societal response to disability: if a community allows physical, architectural, transportation, and other barriers to remain in place, society is creating handicaps that oppress indivi
	Disaccharide A disaccharide is a sugar composed of two monosaccharides.
	Disarm "Disarm" is a song by The Smashing Pumpkins. It was the third single from their second album, Siamese Dream. "Disarm" was written by Billy Corgan and is one of the bands most highly regarded songs. The BBC banned the song from appearing on Top of the Pops, because of the lyric "cut that little child", and it received little radio airplay in the United Kingdom.
	Disaster For the Star Trek: The Next Generation episode, see Disaster . For the upcoming Nintendo Wii game named "Disaster", see Disaster: Day of Crisis A disaster is the impact of a natural disaster or man-made hazard that negatively affects society or natural environment.
	Disc brake The disc brake is a device for slowing or stopping the rotation of a wheel. A brake disc , usually made of cast iron or ceramic, is connected to the wheel or the axle. To stop the wheel, friction material in the form of brake pads is forced mechanically, hydraulics, pneumatically or electromagnetically against both sides of the disc.
	Disc jockey A disc jockey is an individual who selects and plays sound recording for an intended audience.
	DISCiPLE DISCiPLE, Miles Gordon Technology's first product, was a floppy disk Electrical connector for the Sinclair Research ZX Spectrum home computer. Like Sinclair's own Interface 1, the DISCiPLE was a wedge-shaped unit fitting under the Spectrum. It was designed as a super-interface, providing all the facilities a Spectrum owner could need.
	Disclaimer A disclaimer is a statement which generally states that the entity authoring the disclaimer is not responsible for something in some manner. Disclaimers also alert the reader to risks involved. This is generally done as a measure of legal protection; if someone hurts him/herself using something with such a disclaimer, he/she could be discouraged from seeking relief in a legal action.
	Disco Disco is a genre of music that originated in discothques. Generally the term refers to a specific style of music that has influences from funk, soul music, and salsa and the Latin or Hispanic musics which influenced salsa.
	Disco Biscuits The Disco Biscuits are a band from Philadelphia, Pennsylvania. The band is comprised of Jon Gutwillig, Marc Brownstein,, Allen Aucoin, Aron Magner. Former drummer Sam Altman played his last concert as drummer for The Disco Biscuits on 8/27/2005. Magner replaced original keyboardist Ben Hayflick in 1995.
	Discoglossidae Discoglossidae, common name Disc-Tongued Frogs or Painted Frogs, is a family that contains two genera, alytes and discoglossus. The former are somewhat toad-like and can often be found on land. The latter is smoother and more frog-like, preferring the water. Both are generally found in Europe and North-West Africa.
	DISCover DISCover is a technology that allows drag-and-drop play of PC games on a video game console/multimedia center. It attempts to bring games console user-friendliness to the PC games market. Alienware is the foremost manufacturer of DISCover-based systems. DISCover made its debut at the 2004 Consumer Electronics Show.