Dictionary (n.) The unit of heat required to raise the temperature of one kilogram one degree centigrade\, or from 0 to 1. Compare the English standard unit, Foot pound.Thesaurus BTU British thermal unit atomerg dinamode dyne energid erg foot-pound great calorie horsepower-hour horsepower-year joule kilocalorie kilogram-meter kilowatt-hour photon quantum rational calorie therm thermal unit |