B

B[ bi: ]

• n.
  • 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 vitaminB complexvitamin B complexvitamin BB 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：boronatomic 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 Bgroup B