Gram calorie

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Definition

noun, plural: gram calories

(thermodynamics) A nonSI unit for heat energy, which is equivalent to the amount of heat needed to raise the temperature of 1 gram of water by 1 degree Centigrade at 1 atmospheric pressure.


Supplement

A one gram calorie is equal to 4.1840 joules. Joule (which is an SI unit) is now more preferred over gram calorie (which is nonSI unit) for measuring heat energy.


Word origin: from Latin calor, heat

Abbreviation: cal

Compare: kilocalorie