Etymology
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kilocalorie (n.)

also kilo-calorie, 1889 (by 1866 in French, 1870 in German); see kilo- + calorie.

updated on September 18, 2018

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Definitions of kilocalorie from WordNet

kilocalorie (n.)
a unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure; used by nutritionists to characterize the energy-producing potential in food;
Synonyms: Calorie / kilogram calorie / large calorie / nutritionist's calorie
From wordnet.princeton.edu, not affiliated with etymonline.