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- C.g.s. unit of heat, now replaced by the
- joule (one calorie is approximately 4.2
- joules). It is the heat required to raise the
- temperature of one gram of water by 1 degrees
- C. In dietetics, the calorie or kilocalorie
- is equal to 1,000 calories. The kilocalorie
- measures the energy value of food in terms of
- its heat output: 28 g/1 oz of protein yields
- 120 kilocalories, of carbohydrate 110, of fat
- 270, and of alcohol 200.
-