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bicarbonate of soda see sodium bicarbonate and baking soda.
bicentenary occurring every two hundred years; bicentennial. [2 definitions]
bicentennial occurring once every two hundred years. [4 definitions]
biceps a muscle divided in two parts at its origin, esp. the large muscle at the front of the upper arm that bends the elbow.
bichloride of mercury see mercuric chloride.
bichromate dichromate.
bicker to engage in a petty quarrel; squabble. [2 definitions]
bicolor having two colors.
biconcave concave on both surfaces, as a lens.
biconvex convex on both surfaces, as a lens.
bicultural of or displaying a blend of two different cultures in a single area.
bicuspid having two cusps or pointed ends, as certain teeth. [2 definitions]
bicycle a lightweight vehicle with two wheels one behind the other, handlebars for steering, pedals for locomotion, and a small saddlelike seat. (See cycle.) [2 definitions]
bicycle motocross a sport in which bicycles designed for rough terrain are raced on such terrain, or used in the performance of athletic feats such as jumps, spins, and flips.
bicycle pump a small pump used to inflate bicycle tires, esp. a hand-held pump that may be attached to a bicycle frame when not in use.
bid to say to. [8 definitions]
biddable willing to do another's bidding; amenable; obedient. [2 definitions]
bidding direction; command. [2 definitions]
biddy1 a hen or young chicken.
biddy2 (informal) a fussy or talkative old woman.