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british thermal unit

 
Noun british thermal unit has 1 sense
  1. British thermal unit, BTU, B.Th.U. - 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
    --1 is a kind of work unit, heat unit, energy unit
    --1 is a part of therm
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