Which definition of B do you mean?

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