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bigwig (informal) an important person, esp. a dignitary or official. (See VIP.)
bijou a jewel. [2 definitions]
bijugate having two pairs of leaflets, as certain leaves with a featherlike structure.
bike (informal) a bicycle, motorcycle, or motorbike. [2 definitions]
bikeway a roadway or trail reserved for bicycle riding.
bikini a very brief, two-piece bathing suit for women, or underpants cut like the bottom half of this bathing suit.
bilabial having two lips, as certain flowers; bilabiate. [3 definitions]
bilabiate having two lips, as certain flowers.
bilateral having two, esp. symmetrical, sides. [3 definitions]
bilayer biological material composed of two layers of molecules, such as lipids in a cell membrane.
bilberry any of several woody wild or cultivated North American plants that produce edible dark blue berries. [2 definitions]
bilbo (often pl.) a long iron bar with sliding shackles, formerly used to fetter prisoners' feet.
bildungsroman a novel that concerns itself primarily with the psychological and moral development of the main character, usually from youth into adulthood.
bile a bitter yellowish secretion of the liver that aids in the digestion of fats. [2 definitions]
bilge the rounded part of a ship's hull between the bottom and the sides. [5 definitions]
biliary of, pertaining to, or carrying bile.
bilingual capable of speaking two languages almost equally well. [2 definitions]
bilious suffering from an excess of bile or malfunction of the liver. [3 definitions]
bilirubin a reddish-yellow pigment that is formed from the breakdown of heme. Elevated levels in blood are responsible for the yellow color in bruises and in jaundice.
bilk to defraud or swindle, esp. by avoiding due or promised payment. [3 definitions]
bill1 a written statement listing items or services and their cost. [7 definitions]