b.th.u.

1 definition found

b.th.u. - WordNet (r) 2.1 (2005) :

  B.Th.U.
      n 1: a unit of heat equal to the amount of heat required to
           raise one pound of water one degree Fahrenheit at one
           atmosphere pressure; equivalent to 251.997 calories [syn:
           British thermal unit, BTU, B.Th.U.]