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Definition(s) of “J”

j

symbol ( j )

(in electrical engineering and electronics) the imaginary quantity equal to the square root of minus one. Compare with i .

J 1 |jā| (also j)

noun ( pl. Js or J's |jāz|)

1 the tenth letter of the alphabet.

• denoting the next after I (or H if I is omitted) in a set of items, categories, etc.

2 ( J) a shape like that of a capital J.

3 archaic used instead of I as the Roman numeral for one in final position : between ij and iij of the clock.

J 2

abbreviation

• jack (used in describing play in card games).

• Physics joule(s).

• (in titles) Journal (of) : J. Biol. Chem.

• Judge.

• Justice.

joule |joōl; joul| (abbr.: J)

noun

the SI unit of work or energy, equal to the work done by a force of one newton when its point of application moves one meter in the direction of action of the force, equivalent to one 3600th of a watt-hour.

ORIGIN late 19th cent.: named after J. P. Joule .