Definition of B

  • (noun) aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil
  • (noun) the blood group whose red cells carry the B antigen
  • (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
  • (noun) a logarithmic unit of sound intensity equal to 10 decibels
  • (noun) a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder
  • (noun) originally thought to be a single vitamin but now separated into several B vitamins

Antonyms of B


No Antonyms Found.

Homophones of B





Common English words

A list of the most frequently used words in the English languge.

Longest English Words

Longest words in the Oxford Dictionary.