1. A unit of heat defined as the quantity of heat required to raise the temperature of 1 gram of water by 1 degree Celsius at atmospheric pressure
   "The nutritional label listed cals per serving";
   - calorie, gram calorie, small calorie

1. Computer-assisted learning

1. 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
   - Calorie, kilogram calorie, kilocalorie, large calorie, nutritionist's calorie, kcal

Derived forms: cals

Type of: energy unit, heat unit, work unit

Encyclopedia: Cal, Manyas