from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The International System unit of electrical, mechanical, and thermal energy.
- n. A unit of electrical energy equal to the work done when a current of one ampere is passed through a resistance of one ohm for one second.
- n. A unit of energy equal to the work done when a force of one newton acts through a distance of one meter. See Table at measurement.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. In the International System of Units, the derived unit of energy, work and heat; the work required to exert a force of one newton for a distance of one metre. Also equal to the energy of one watt of power for a duration of one second. Symbol: J
from the GNU version of the Collaborative International Dictionary of English
- n. 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.
from The Century Dictionary and Cyclopedia
- n. An electrical unit proposed by Siemens.
- n. A practical unit of work or energy equal to 107 ergs, 0.10197 + kilogram-meters, 0.2388+ calories, or 0.7376+ foot-pounds. It was formally adopted as a unit by the international Congress in Chicago (1893) and was legalized in the United States in 1894.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a unit of electrical energy equal to the work done when a current of one ampere passes through a resistance of one ohm for one second
- n. English physicist who established the mechanical theory of heat and discovered the first law of thermodynamics (1818-1889)
After James Prescott Joule.(American Heritage® Dictionary of the English Language, Fourth Edition)
Named after the English physicist James Prescott Joule. (Wiktionary)