unit used to express heat and the energy value of food
the amount of heat required at a pressure of one atmosphere to raise the temperature of one gram of water one degree Celsius that is equal to about 4.19 joules abbreviation cal called also gram calorie small calorie
unit equivalent to the large calorie expressing heat-producing or energy-producing value in food when oxidized in the body
amount of food having an energy-producing value of one large calorie