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diploid in biology, having two of each non-sex-determining chromosome in each cell. [3 definitions]
diploma a document conferring some honor or privilege, esp. a document granted by an educational institution and certifying that the recipient has completed a course of study or earned a degree.
diplomacy the practice or skill of conducting negotiations between nations or governments. [2 definitions]
diplomat an official employed to conduct negotiations between nations or governments. [2 definitions]
diplomate a person who holds a diploma, esp. a physician or engineer certified as a specialist by a board of respected professionals.
diplomatic of or pertaining to diplomacy. [2 definitions]
diplomatic immunity exemption from local laws, granted to diplomatic personnel and their dependents while in a foreign country.
diplopia a vision disorder in which two images of the same object are seen, also called double vision.
dipole a pair of electric charges or magnetic poles that are of equal magnitude but opposite polarity. [3 definitions]
dipole antenna a radio or television antenna consisting of two equal rods that extend outward in opposite directions.
dipper someone or something that dips. [4 definitions]
dippy (slang) foolish or eccentric.
dipsomania an uncontrollable, usu. periodic craving for alcoholic drink.
dipstick a rod with graduated markings used to measure the depth of a liquid, such as oil in an automobile crankcase.
dipteran of or pertaining to a two-winged insect; dipterous. [2 definitions]
dipterous of or pertaining to a dipteran. [2 definitions]
diptych an ancient writing tablet consisting of two wooden or ivory leaves that are hinged together. [2 definitions]
dire causing, likely to cause, or involving terror or suffering. [3 definitions]
direct to give instructions that lead or guide. [14 definitions]
direct action a form of non-violent political action using immediately available means of communication, disruption, and confrontation, such as picketing, boycotts, demonstrations, and roadblocks.
direct current an electric current that flows in one direction. (Cf. alternating current.)