Noun

• S: (n) bacillus, B (aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil)
• S: (n) 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)
• S: (n) 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)
• S: (n) Bel, B (a logarithmic unit of sound intensity equal to 10 decibels)
• S: (n) 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)
• S: (n) B, b (the 2nd letter of the Roman alphabet)
• S: (n) B, type B, group B (the blood group whose red cells carry the B antigen)