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Medical Definition of Joule's equivalent
1. The dynamic equivalent of heat; the amount of work converted to heat that will raise the temperature of 1 pound of water 1°F is 778 foot-pounds; in metric units, 1 calorie, which raises 1 gram of water 1°C, equals 4.184 × 107 dyne-centimeters, which equals 4.184 joules. (05 Mar 2000)