the tenth letter of the alphabet
a shape like that of a capital J (without a crosspiece)
used instead of I as the Roman numeral for one in final position
between ij and iij of the clock
jack (used in describing play in card games)
Japan (international vehicle registration)
joule(s)
(in titles) Journal (of)
J. Biol. Chem
(in electrical engineering and electronics) the imaginary quantity equal to the square root of minus one
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 metre in the direction of action of the force, equivalent to one 3600th of a watt-hour