British thermal unit

/ˌˈbrɪdɪʃ ˌθʌrməl ˈjunət/
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Other forms: British thermal units

Definitions of British thermal unit
  1. noun
    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
    synonyms: B.Th.U., BTU
    see moresee less
    type of:
    energy unit, heat unit, work unit
    a unit of measurement for work
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