Definition of B

Noun

• the blood group whose red cells carry the B antigen
  - type b - group b
• 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
  barn
• a logarithmic unit of sound intensity equal to 10 decibels
  bel
• a trivalent metalloid element
  occurs both in a hard black crystal and in the form of a yellow or brown powder
  boron - atomic number 5
• originally thought to be a single vitamin but now separated into several B vitamins
  - b complex vitamin - b complex - vitamin b complex - vitamin b - b vitamin
• aerobic rod-shaped spore-producing bacterium
  often occurring in chainlike formations
  found primarily in soil
  bacillus

Word games points for the B

• Scrabble® score of the b (3)
• Word Chums® score of the b (4)
• Words With Friends® score of the b (4)