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cal·o·rie
 (k  l   -r  )
KEY
NOUN:
-
Abbr.
cal
Any of several approximately equal units of heat, each measured as the quantity of heat required to raise the temperature of 1 gram of water by 1°C from a standard initial temperature, especially from 3.98°C, 14.5°C, or 19.5°C, at 1 atmosphere pressure.
Also called
gram calorie
,
small calorie
.
-
Abbr.
cal
The unit of heat equal to 1/100 the quantity of heat required to raise the temperature of 1 gram of water from 0 to 100°C at 1 atmosphere pressure.
Also called
mean calorie
.
-
-
Abbr.
Cal
The unit of heat equal to the amount of heat required to raise the temperature of 1 kilogram of water by 1°C at 1 atmosphere pressure.
Also called
kilocalorie
,
kilogram calorie
,
large calorie
.
- A unit of energy-producing potential equal to this amount of heat that is contained in food and released upon oxidation by the body.
Also called
nutritionist's calorie
.
ETYMOLOGY:
French, from Latin calor, heat ; see
caloric
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