Calorie

Noun

 * 1) (physics and chemistry, obsolete) the gram calorie or small calorie, a non-SI unit of energy, equivalent to approximately 4.2 joules. This unit was widely used in chemistry and physics, being the amount of energy needed to raise the temperature of 1 gram of water by 1 °C.
 * 2)  kilogram calorie or large calorie. A unit of energy 1000 times larger than the gram calorie. It is equivalent to the gram kilocalorie, approximately 4.2 kilojoules.

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