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j

[jey]

Origin

noun, plural J's or Js, j's or js.

the tenth letter of the English alphabet, a consonant.

any spoken sound represented by the letter J or j, as in just, major, or rajah.

something having the shape of a J.

a written or printed representation of the letter J or j.

a device, as a printer's type, for reproducing the letter J or j.

Dictionary.com Unabridged

Jewish.

Physics. joule; joules. Also, j

Symbol.

the tenth in order or in a series, or, when I is omitted, the ninth.

(sometimes lowercase) the medieval Roman numeral for 1.

Compare Roman numerals.

Symbol.

Mathematics. a unit vector on the y-axis of a coordinate system.

Engineering. the imaginary number

Cards. Jack.

Journal.

Judge.

Justice.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Link To j

Collins

World English Dictionary

j or J (dʒeɪ)

—n , pl j's, J's, Js
1.	the tenth letter and seventh consonant of the modern English alphabet
2.	a speech sound represented by this letter, in English usually a voiced palato-alveolar affricate, as in jam

J or J

—n

j or J (dʒeɪ)

—n , pl j's, J's, Js
1.	the tenth letter and seventh consonant of the modern English alphabet
2.	a speech sound represented by this letter, in English usually a voiced palato-alveolar affricate, as in jam

J or J

—n

j

—*symbol for*
1.	maths the unit vector along the y-axis
2.	obsolete Also called: i the imaginary number √--1

J

—*symbol for*
1.	cards jack
2.	joule(s)
3.	current density

—*abbreviation for*
4.	Japan (international car registration)

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline

Word Origin & History

the letter is a late modification of Roman -i-, originally a scribal creation in continental M.L. to distinguish small -i- in cursive writing from the strokes of other letters, especially in the final positions of words. But in Eng., -y- was used for this, and -j- was introduced c.1600-1640 to take up

EXPAND

the consonantal sound that had evolved from -i- since L.L. times. This usage first was attested in Sp., where it was in place before 1600. Eng. dictionaries continued to lump together words beginning in -i- and -j- until 19c.

COLLAPSE

Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage

Medical Dictionary

J abbr.
joule

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage

Science Dictionary

J
Abbreviation of joule

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Slang Dictionary

J definition

and jay

n.
a marijuana cigarette; marijuana. (Drugs. From the initial letter of joint.) : A jay will cost you two clams.

Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw Hill.
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FOLDOC

Computing Dictionary

J definition

A derivative and redesign of APL with added features and control structures. J is purely functional with lexical scope and more conventional control structures, plus several new concepts such as function rank and function arrays. J was designed and developed by Kennneth E. Iverson and Roger Hui . J uses only the ASCII character set but has a spelling scheme that retains the advantages of APL's special alphabet. J is a conventional procedural programming language but can be used as a purely functional language.
Version 4.1 for MS-DOS, Sun, Mac, Archimedes. Source available in C from Iverson Software, +1 (416) 925 6096.
Version 6 package from ISI includes an interpreter and tutorial. Ported to DEC, NeXT, SGI, Sun-3, Sun-4, Vax, RS/6000, MIPS, Macintosh, Acorn Archimedes, IBM PC, Atari, 3b1, Amiga.
(ftp://watserv1.waterloo.edu/languages/apl/j).
J-mode GNU Emacs macros available by (ftp://think.com/pub/j/gmacs/j-interaction-mode.el).
["APL\?", Roger K.W. Hui et al, APL90 Conf Proc, Quote Quad 20(4):192-200].
(1992-10-31)

American Heritage

Abbreviations & Acronyms