kcal

/K EY1 K AA0 L/
noun
  1. 1

    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.

Source: https://en.wiktionary.org/wiki/kcal, https://en.wiktionary.org/wiki/kilocalorie