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Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This

cal·o·rie

Audio Help [kal-uh-ree] Pronunciation Key

–noun

Thermodynamics.

a.	Also called gram calorie, small calorie. an amount of heat exactly equal to 4.1840 joules. Abbreviation: cal

b.	(usually initial capital letter) kilocalorie. Abbreviation: Cal

Physiology.

a.	a unit equal to the kilocalorie, used to express the heat output of an organism and the fuel or energy value of food.

b.	a quantity of food capable of producing such an amount of energy.

Also, calory.

[Origin: 1800–10; < F, equiv. to calor- (< L calor heat) + -ie -y³

]

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

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Encyclopædia Britannica, Inc.
Calorie

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kil·o·cal·o·rie

Audio Help [kil-uh-kal-uh-ree] Pronunciation Key

–noun Thermodynamics.

one thousand small calories. Abbreviation: kcal Also called Calorie, kilogram calorie, large calorie. Compare calorie (def. 1a).

[Origin: 1890–95; kilo- + calorie

]

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

American Heritage Dictionary - Cite This Source - Share This

cal·o·rie Audio Help (kāl'ə-rē) Pronunciation Key
n.

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.
1. 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.
2. 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.

[French, from Latin calor, heat; see caloric.]

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

Online Etymology Dictionary - Cite This Source - Share This
calorie

1866, from L. calor (gen. caloris) "heat," from PIE base *kel- "warm" (cf. L. calere "be hot;" Skt. carad- "harvest," lit. "hot time;" Lith. silti "become warm," silus "August;" O.N. hlær "warm"). Technically, the heat required to raise 1 kilogram of water 1 degree Celsius. In scientific use, largely replaced 1950 by the joule. Caloric, the supposed elastic fluid that accounted for phenomena of heat in Lavoisier's now-abandoned theory, was in use from 1792.

WordNet - Cite This Source - Share This

calorie
noun
1.	a unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure; used by nutritionists to characterize the energy-producing potential in food
2.	unit of heat defined as the quantity of heat required to raise the temperature of 1 gram of water by 1 degree centigrade at atmospheric pressure

Kernerman English Multilingual Dictionary - Cite This Source - Share This
calorie1 [ˈkӕləri] noun

(abbreviated to cal when written) a unit of heat

Arabic:	سُعر حراري، وِحْدَه حَراريَّه
Chinese (Simplified):	卡路里（热量单位）
Chinese (Traditional):	卡路裡(熱量單位)
Czech:	kalorie
Danish:	kalorie
Dutch:	calorie
Estonian:	kalor
Finnish:	kalori
French:	calorie
German:	die Wärmeeinheit
Greek:	μονάδα θερμότητας
Hungarian:	kalória
Icelandic:	kaloría, hitaeining
Indonesian:	kalori
Italian:	caloria

Japanese:	熱量
Korean:	칼로리(열량의 단위)
Latvian:	kalorija
Lithuanian:	kalorija
Norwegian:	kalori
Polish:	kaloria
Portuguese (Brazil):	caloria
Portuguese (Portugal):	caloria
Romanian:	calorie
Russian:	калория
Slovak:	kalória
Slovenian:	kalorija
Spanish:	caloría
Swedish:	kalori
Turkish:	ısı

calorie2 [ˈkӕləri] noun

a unit of energy given by food
Example: My diet allows me 1,200 calories per day.

Arabic:	وِحْدَه حَراريَّه، كالوري
Chinese (Simplified):	食物产生的热量单位
Chinese (Traditional):	食物產生的熱量單位
Czech:	kalorie
Danish:	kalorie
Dutch:	calorie
Estonian:	kalor
Finnish:	kalori
French:	calorie
German:	die Kalorie
Greek:	θερμίδα
Hungarian:	kalória
Icelandic:	hitaeining, kaloría
Indonesian:	kalori
Italian:	caloria

Japanese:	カロリー
Korean:	(음식물의) 칼로리
Latvian:	kalorija
Lithuanian:	kalorija
Norwegian:	kalori
Polish:	kaloria
Portuguese (Brazil):	caloria
Portuguese (Portugal):	caloria
Romanian:	calorie
Russian:	калория
Slovak:	kalória
Slovenian:	kalorija
Spanish:	caloría
Swedish:	kalori
Turkish:	kalori

The American Heritage Science Dictionary - Cite This Source - Share This

calorie Audio Help (kāl'ə-rē) Pronunciation Key

A unit of energy equal to the amount of heat needed to raise the temperature of one gram of water by one degree Celsius. One calorie is equivalent to 4.1868 joules. Also called small calorie.
Calorie A unit of heat equal to the amount of heat needed to raise the temperature of 1,000 grams of water by one degree Celsius. This unit is used as a measure of the energy released by food as it is digested by the human body. Also called kilocalorie, large calorie.

American Heritage New Dictionary of Cultural Literacy, Third Edition - Cite This Source - Share This
Calorie

The amount of heat required to raise the temperature of a kilogram of water by one degree Celsius. A calorie (with a lower-case c) is a measurement of the heat needed to raise the temperature of a gram of water, rather than a kilogram.

[Chapter:] Physical Sciences and Mathematics

Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Calorie

Cal"o*rie\, n. [F., fr. L. calor heat.] (Physics) The unit of heat according to the French standard; the amount of heat required to raise the temperature of one kilogram (sometimes, one gram) of water one degree centigrade, or from 0[deg] to 1[deg]. Compare the English standard unit, Foot pound.

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