b

aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil

originally thought to be a single vitamin but now separated into several B vitamins

a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder

a logarithmic unit of sound intensity equal to 10 decibels

(physics) a unit of nuclear cross section; the effective circular area that one particle presents to another as a target for an encounter

the 2nd letter of the Roman alphabet

the blood group whose red cells carry the B antigen