GNU Collaborative International Dictionary of English

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  1.       
joule (jo͞ol), n. [From the distinguished English physicist, James Prescott Joule (1818-1889).] (Physics.) A unit of work which is equal to 107 ergs (the unit of work in the C. G. S. system of units), and is equivalent to one watt-second, the energy expended in one second by an electric current of one ampere in a resistance of one ohm; also called the absolute joule.  It is abbreviated J or j.  The international joule is slightly larger, being 1.000167 times the absolute joule.  The absolute joule is approximately equal to 0.737562 foot pounds, 0.239006 gram-calories (small calories),  and 3.72506 x 10-7 horsepower-hours, and 0.000948451 B.t.u.  HCP61

    [1913 Webster +PJC]

    Joule's equivalent. See under Equivalent, n.

    [1913 Webster]

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