b

Noun

• the blood group whose red cells carry the B antigen

• the 2nd letter of the Roman alphabet

• (physics) a unit of nuclear cross section; the effective circular area that one particle presents to another as a target for an encounter

• a logarithmic unit of sound intensity equal to 10 decibels

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

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

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

Related words

• Synonyms: 
  B , type B , group B , barn , Bel , boron , atomic number 5 , B-complex vitamin , B complex , vitamin B complex , vitamin B , B vitamin , bacillus