Pronunciation: ( jOOl, joul),[key] —n.Physics. the SI unit of work or energy, equal to the work done by a force of one newton when its point of application moves through a distance of one meter in the direction of the force: equivalent to 107 ergs and one watt-second. Abbr.: J, j Also called newton-meter.
Pronunciation: ( jOOl, joul),[key] —n. James Prescott, 1818–89, English physicist.