kilocalorie

noun

a non-SI unit of energy equal to 1,000 calories, used (now rare) in chemistry or physics; equal to 1 calorie or Calorie as used in nutrition. Symbol kcal.

noun

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