b

Definition
(noun) aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil Definition
(noun) originally thought to be a single vitamin but now separated into several B vitamins Definition
(noun) a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder Definition
(noun) a logarithmic unit of sound intensity equal to 10 decibels Definition
(noun) (physics) a unit of nuclear cross section; the effective circular area that one particle presents to another as a target for an encounter Definition
(noun) the 2nd letter of the Roman alphabet Definition
(noun) the blood group whose red cells carry the B antigen