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:kilocalorie, kilogram calorie, large calorie, nutritionist's calorie.
2.
Unit of heat defined as the quantity of heat required to raise the temperature of 1 gram of water by 1 degree centigrade at atmospheric pressure. Synonyms:gram calorie, small calorie.
