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calorie (n.)1866, from Fr (French). calorie, from L. (Latin) calor (gen. caloris) "heat," .... In scientific use, largely replaced 1950 by the joule. As a unit of energy, defined as "heat required to raise 1 gram of water 1 degree Celsius" (the small or gram calorie), but also as "heat required to raise 1 kilogram of water 1 degree Celsius" (the large calorie or kilocalorie).

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12y ago

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