B

B

名词 b:

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

同义词：bacillus

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

同义词：B-complex vitamin, B complex, vitamin B complex, vitamin B, B vitamin

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

同义词：boron, atomic number 5

a logarithmic unit of sound intensity equal to 10 decibels

同义词：Bel

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

同义词：barn

the 2nd letter of the Roman alphabet

同义词：letter b

the blood group whose red cells carry the B antigen

同义词：type B, group B