VariousWords beta
Related Terms:
Definitions:
Noun
British thermal unit
BTU
B.Th.U.
Definition: 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
Definition: The quantity of heat required to raise the temperature of one pound of water one degree Fahrenheit at a particular temperature (there are several different precise definitions) and a pressure of one atmosphere.