B.Th.U.


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Noun1.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 pressureB.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
energy unit, heat unit, work unit - a unit of measurement for work
therm - a unit of heat equal to 100,000 British thermal units