- B.Th.U.
- abbr. (also B.t.u., BTU, B.Th.U.) British thermal unit(s).
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nouna 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• Hypernyms: ↑work unit, ↑heat unit, ↑energy unit• Part Holonyms: ↑therm* * *
B.Th.U.,British. British thermal unit or units.
Useful english dictionary. 2012.