1. (noun)bacillus, B aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil Synonyms: barn, vitamin B, atomic number 5, group B, vitamin B complex, boron, type B, bacillus
2. (noun)B-complex vitamin, B complex, vitamin B complex, vitamin B, B vitamin, B originally thought to be a single vitamin but now separated into several B vitamins Synonyms: boron, barn, vitamin B, atomic number 5, group B, vitamin B complex, type B, bacillus
3. (noun)boron, B, atomic number 5 a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder Synonyms: barn, vitamin B, atomic number 5, group B, vitamin B complex, boron, type B, bacillus
5. (noun)barn, b (physics) a unit of nuclear cross section; the effective circular area that one particle presents to another as a target for an encounter Synonyms: barn, vitamin B, atomic number 5, b, group B, vitamin B complex, boron, type B, bacillus
Synonyms and Antonyms of B 
