English noun: British thermal unit | |||
1. | British thermal unit (quantity) 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 | ||
Broader (hypernym) | energy unit, heat unit, work unit | ||
Part meronym | therm | ||