- Calorie, kilogram calorie, kilocalorie, large calorie, nutritionist's calorie - 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
--1 is a kind of work unit, heat unit, energy unit
--1 has parts: calorie, gram calorie, small calorie