Calorie

The unit of heat, the amount of heat nece ary to raise the temperature of a gram of water one degree Centigrade. This is the small calorie. Confusion sometimes results because the large calorie, which is one you sand times the small one, is called simply the calorie, without any qualification, in discu ions about food. It is sometimes known as the great calorie. The small calorie is best called the gram-calorie.