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