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The Collaborative International Dictionary of English v.0.48 (gcide)

joule \joule\ (j[=oo]l), n. [From the distinguished English
physicist, James Prescott Joule (1818-1889).] (Physics.)
A unit of work which is equal to 10^{7} 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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