# calorie

## Definitions

### Construction

• The amount of heat required, at a pressure of one atmosphere, to raise the temperature of one gram of water 1°C.

### Electronics

• A unit of heat energy. Its abbreviation is cal, and its symbol is c. One calorie is equal to the heat required to raise one gram of water one degree Celsius, at a pressure of one atmosphere. It is equal to approximately 4.186 joules. One thousand calories equal one kilocalorie, and one kilo-calorie is equal to one Calorie. Please note that in the case of the larger Calorie, the term's first letter is capitalized to distinguish it from the smaller calorie. Often the two terms are confused because of this minor, and often ignored, difference.
• (written as Calorie)
A unit of heat energy. Its abbreviation is Cal, and its symbol is C. One Calorie is equal to the heat required to raise one kilogram of water one degree Celsius, at a pressure of one atmosphere. It is equal to approximately 4.186 kilojoules. One Calorie is equal to one thousand calories, and one Calorie is equal to one kilocalorie. Please note that the first letter of this term is capitalized to distinguish it from the smaller calorie. Often the two terms are confused because of this minor, and often ignored, difference. Also called large calorie.
• symbolC
(written as Calorie)

### Food

• The outdated measure of the energy content of foods, still used in popular parlance to estimate the fattening potentiality of food (since if not used for energy, food is usually stored as fat). The Calorie (capital C) or kilocalorie used in nutrition has 1000 times the value of the calorie (small c) used in science and is the energy required to heat 1 kg of water by 1°C.

### Medical

• noun a unit of measurement of heat or energy, equivalent to the amount of heat needed to raise the temperature of 1g of water by 1° C.
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