B

• (noun) aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil

  synonyms : bacillus

• (noun) the blood group whose red cells carry the B antigen

  synonyms : group b , type b

• (noun) the 2nd letter of the Roman alphabet

• (noun) (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

• (noun) a logarithmic unit of sound intensity equal to 10 decibels

  synonyms : bel

• (noun) a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder

  synonyms : atomic number 5 , boron

• (noun) originally thought to be a single vitamin but now separated into several B vitamins

  synonyms : b complex , b vitamin , b-complex vitamin , vitamin b , vitamin b complex

WordNet® 3.0, © 2006 by Princeton University.

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