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X, x

  [eks]
Use x in a Sentence
–noun, plural X's or Xs, x's or xs.
1. the 24th letter of the English alphabet, a consonant.
2. any spoken sound or combination of sounds represented by the letter X or x, as in xylene, box, or exact.
3. something having the shape of an X.
4. a written or printed representation of the letter X or x.
5. a device, as a printer's type, for reproducing the letter X or x.

x

  [eks]
–verb (used with object), x-ed or x'd  [ekst] , x-ing or x'ing  [ek-sing] .
1. to cross out or mark with or as if with an x (often fol. by out): to x out an error.
2. to indicate choice, as on a ballot or examination (often fol. by in): to x in the candidate of your choice.
Origin:
1840–50

X

 
1. experimental.
2. extra.
3. extraordinary.

X

 
Symbol.
1. the 24th in order or in a series, or, when I is omitted, the 23rd.
2. (sometimes lowercase) the Roman numeral for 10. Compare Roman numerals.
3. Christ.
4. Christian.
5. cross.
6. Electricity. reactance.
7. Slang. a ten-dollar bill.
8. (in the U.S.) a rating of the Motion Picture Association of America for movies with subject matter that is suitable for adults only: persons who are under age (usually 17) will not be admitted. Compare G (def. 7), PG, PG-13, See R (def. 5).
9. (in Great Britain) a designation for a film recommended for adults only. Compare A (def. 11), AA (def. 5), U (def. 5).
10. a person, thing, agency, factor, etc., of unknown identity.
11. Chemistry. (formerly) xenon.

x

 
1. ex 1 (def. 1).
2. excess.
3. Stock Exchange.
a. (of stock trading) ex dividend.
b. (of bond trading) ex interest.
4. experimental.
5. extra.

x

 
Symbol.
1. an unknown quantity or a variable.
2. (used at the end of letters, telegrams, etc., to indicate a kiss.)
3. (used to indicate multiplication) times: 8 × 8=64.
4. (used between figures indicating dimensions) by: 3″ × 4″ (read: “three by four inches”); 3″ × 4″ × 5″ (read: “three by four by five inches”).
5. power of magnification: a 50x telescope.
6. (used as a signature by an illiterate person.)
7. cross.
8. crossed with.
9. (used to indicate a particular place or point on a map or diagram.)
10. out of; foaled by: a colt by Flag-a-way x Merrylegs.
11. (used to indicate choice, as on a ballot, examination, etc.)
12. (used to indicate an error or incorrect answer, as on a test.)
13. Mathematics. (in Cartesian coordinates) the x-axis.
14. Chess. captures.
15. a person, thing, agency, factor, etc., of unknown identity.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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ab·scis·sa   (āb-sĭs'ə)   


(click for larger image in new window)
n.   Symbol x2 pl. ab·scis·sas or ab·scis·sae (-sĭs'ē)
The coordinate representing the position of a point along a line perpendicular to the y-axis in a plane Cartesian coordinate system.

[New Latin (līnea) abscissa, (line) cut off, from Latin abscissa, feminine of abscissus, past participle of abscindere, to abscise; see abscise.]
re·ac·tance   (rē-āk'təns)   
n.   Symbol X Electricity
Opposition to the flow of alternating current caused by the inductance and capacitance in a circuit rather than by resistance.
x 1 or X   (ěks)   
n.   pl. x's or X's also xs or Xs
  1. The 24th letter of the modern English alphabet.
  2. Any of the speech sounds represented by the letter x.
  3. The 24th in a series.
  4. Something shaped like the letter X.
  5. A mark inscribed to represent the signature of one who is unable to sign one's name.
  6. An unknown or unnamed factor, thing, or person.
tr.v.   x'd or X'd, x'ing or X'ing, x's or X's
  1. To mark or sign with an X.
  2. To delete, cancel, or obliterate with a series of X's. Often used with out.
x 2  
The symbol for abscissa.
X 1   (ěks)   
n.  A movie rating indicating that admission will not be granted to anyone under the age of 17.
X 2  
  1. The symbol for reactance.
  2. also x The symbol for the Roman numeral 10.
X 3  
abbr.  
  1. Christ (Greek Χριστoς, Christos)
  2. Christian
  3. or x experimental
  4. extra
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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X

X\ ([e^]ks). X, the twenty-fourth letter of the English alphabet, has three sounds; a compound nonvocal sound (that of ks), as in wax; a compound vocal sound (that of gz), as in example; and, at the beginning of a word, a simple vocal sound (that of z), as in xanthic. See Guide to Pronunciation, [sect][sect] 217, 270, 271.

Note: The form and value of X are from the Latin X, which is from the Greek [Chi], which in some Greek alphabets had the value of ks, though in the one now in common use it represents an aspirated sound of k.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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X

/X/ n.
1. Used in various speech and writing contexts (also in lowercase) in roughly its algebraic sense of `unknown within a set defined by context' (compare N). Thus, the abbreviation 680x0 stands for 68000, 68010, 68020, 68030, or 68040, and 80x86 stands for 80186, 80286, 80386, 80486, 80586 or 80686 (note that a Unix hacker might write these as 680[0-6]0 and 80[1-6]86 or 680?0 and 80?86 respectively; see glob).
2. [after the name of an earlier window system called `W'] An over-sized, over-featured, over-engineered and incredibly over-complicated window system developed at MIT and widely used on Unix systems.
Jargon File 4.2.0
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X 
most Eng. words beginning in -x- are of Gk. origin or modern commercial coinages. E. Anglian in 14c. showed a tendency to use -x- for initial sh-, sch- (cf. xal for shall), which didn't catch on but seems an improvement over the current system. As a symbol of a kiss on a letter, etc., it is recorded from 1765. In malt liquor, XX denoted "double quality" and XXX "strongest quality" (1827). Algebraic meaning "unknown quantity" (1660 in Eng.), sometimes said to be from medieval use, originally a crossed -r-, probably from L. radix (see root). Other theories trace it to Arabic, but a more prosaic explanation says Descartes (1637) took x, y, z, the last three letters of the alphabet, for unknowns to correspond to a, b, c, used for known quantities. Used allusively for "unknown person" from 1797, "something unknown" since 1859. As a type of chromosome, attested from 1902. First used 1950 in Britain to designate "films deemed suitable for adults only;" adopted in U.S. Nov. 1, 1968.
Online Etymology Dictionary, © 2001 Douglas Harper
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X

1. A Nasdaq stock symbol specifying that it is a mutual fund.

2. A symbol used in stock transaction tables found on the internet and in newspapers to indicate that a stock is trading ex-dividends or ex-rights.

Investopedia Commentary

1. Nasdaq-listed securities have four or five characters. If a fifth letter appears, it identifies the issue as other than a single issue of common stock or capital stock.

2. Typically after a dividend is paid or a right is distributed, a stock's price will drop by a similar amount. Because of this, it's important for investors to be aware of when a distribution is made so that the depreciation in price is not mistaken for something else.

Related Links

Declaration, Ex-dividend And Record Date Defined

See also: Dividend, Ex-dividend, Ex-rights, Mutual Fund, Nasdaq, Stock Symbol

Also spelled: X

Investopedia.com. Copyright © 1999-2005 - All rights reserved. Owned and Operated by Investopedia Inc.
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x

Used in stock transaction tables in newspapers to indicate a stock that trades ex-dividend or ex-rights: Gencp x212.

Wall Street Words: An A to Z Guide to Investment Terms by David L. Scott.
Copyright © 2003. Published by Houghton Mifflin.
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Main Entry: x
Pronunciation: 'eks
Function: noun
often cap 1 : a mark used in place of a signature when the maker is incapable of signing his or her name (as because of illiteracy or a physical ailment)
2 : a mark used in indicating a choice or applicable item (as on an insurance form)

Main Entry: x
Function: abbreviation
1ex-distribution
2ex-dividend
3ex-rights
4ex-warrants
Merriam-Webster's Dictionary of Law, © 1996 Merriam-Webster, Inc.
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Main Entry: x
Pronunciation: 'eks
Function: noun
Inflected Form: plural x's or xs or x'es or xes /'ek-s&z/
: the basic or monoploid number of chromosomes of a polyploid series : the number contained in a single genome —compare N 1

Main Entry: x
Function: symbol
1 cap halogen atom —used in general formulas (as of trihalomethane CHX3)
2 power of magnification
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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X
1. Used in various speech and writing contexts (also in lowercase) in roughly its algebraic sense of "unknown within a set defined by context" (compare N). Thus, the abbreviation 680x0 stands for 68000, 68010, 68020, 68030 or 68040, and 80x86 stands for Intel 80186, Intel 80286, Intel 80386 or Intel 80486. A Unix hacker might write these as 680[0-4]0 and 80[1-4]86 or 680?0 and 80?86 respectively; see glob.
2. An alternative name for the X Window System.
3. A suffix for the speed of a CD-ROM drive relative to standard music CDs (1x). 32x is common in September 1999.
[The Jargon File]
(1999-09-15)

The Free On-line Dictionary of Computing, © 1993-2007 Denis Howe
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x
  1. abscissa
  2. by
  3. times (that is, multiplication)
X
  1. adult audiences only
  2. Christ
  3. Christian
  4. experimental
  5. extra
  6. reactance
  7. 10
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source

X

American band whose tales of urban decay, corruption, and sleaze, delivered with skilled musicianship and unique vocal harmonies, marked them as important contributors to the punk movement. The original members were Exene Cervenka (original name Christine Cervenka; b. Feb. 1, 1956, Chicago, Ill., U.S., ), John Doe (b. Feb. 25, 1953, Decatur, Ill., ), Billy Zoom (original name Ty Kindell; b. Feb. 20, 1948, Illinois, ), and D.J. Bonebrake (b. Dec. 8, 1955, North Hollywood, Calif., ). Later members included Dave Alvin (b. Nov. 11, 1955, Los Angeles, Calif., ) and Tony Gilkyson.

Learn more about X with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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