definition of
Joule

[1] #1 Joule n. [joule, J, watt second] 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. wn

[2] #2 Joule n. [James Prescott Joule] English physicist who established the mechanical theory of heat and discovered the first law of thermodynamics (1818-1889). wn