CT: Joule, unit of work or energy in the International System of Units (SI); it is equal to the work done by a force of one newton acting through one metre. Named in honour of the English physicist James Prescott Joule, it equals 107 ergs, or approximately 0.7377 foot-pounds. In electrical terms, the joule equals one watt-second—i.e., the energy released in one second by a current of one ampere through a resistance of one ohm.
S: EncBrit – http://global.britannica.com/EBchecked/topic/306617/joule (last access: 20 December 2014)
N: 1. unit of electrical energy, 1882, coined in recognition of British physicist James P. Joule (1818-1889).
2. Unit of energy, equivalent to the work done by a force of one newton moving one metre in the direction of action of the force.
3. In the field of radiation protection, the “joule” is used as a measure of the potential alpha energy of radon and thoren daughters.
4. Symbol: J.
joule: term officially approved by the Small Arms Terminology Working Group.
5. How to convert energy in joules (J) to electric power in watts (W).
You can calculate watts from joules and seconds, but you can’t convert joules to watts, since joule and watt units represent different quantities.
S: 1. OED – http://www.etymonline.com/index.php?allowed_in_frame=0&search=joule&searchmode=none (last access: 20 December 2014). 2. TERMIUMPLUS (Small Arms Terminology Working Group (SATWG)). 3 & 4. TERMIUMPLUS. 5. http://www.rapidtables.com/convert/electric/Joule_to_Watt.htm (last access: 20 December 2014).
S: GDT; TERMIUMPLUS.