X

Etymology 1
From the letter, from the  letter , created ex nihilo.

Letter

 * 1) The twenty-fourth letter of the basic modern Latin alphabet.

Numeral

 * 1)  Roman numeral ten (10)
 * 2)   the tenth.

Symbol

 * 1) One of the tristimulus values which, with Y and Z, defines coordinates in a three-dimensional color space. Pronounced (in English) big X or cap X.
 * 2)  halogen
 * 1) One of the tristimulus values which, with Y and Z, defines coordinates in a three-dimensional color space. Pronounced (in English) big X or cap X.
 * 2)  halogen
 * 1) One of the tristimulus values which, with Y and Z, defines coordinates in a three-dimensional color space. Pronounced (in English) big X or cap X.
 * 2)  halogen
 * 1)  halogen
 * 1)  halogen
 * 1)  halogen
 * 1)  halogen

Etymology 2
Possibly from skull and crossbones.

Etymology 1
Introduced by René Descartes in the context of mathematical notation, but has since widened to other contexts.

Numeral

 * 1)  An unknown quantity or unknown value.

Proper noun

 * The woman known until now as Witness X has been unmasked after a court ruling.
 * Suppose that Mr and Mrs X have been married for many years.
 * , used by those who have had their identity or heritage, including their proper ancestral names, erased or forgotten.
 * Malcolm X
 * Malcolm X

Noun

 * 1)  Any mark that looks like that letter, such as a mark made by a person who cannot read or write in lieu of a signature.
 * 2)  The spot behind the goal.

Adjective

 * 1) Intersex or non-binary.

Etymology 3
Presumably by abbreviation of the pronunciation of.

Noun

 * 1)  Ecstasy, a particular street drug.

Translations

 * Finnish:, , ,

Adjective

 * 1)  Suitable only for those aged 16 or (later) 18 years and over.
 * 2)  Obscene.

Translations

 * Finnish:
 * Swedish:


 * French:
 * Spanish:

Etymology 5
From by abbreviation,, from.

Proper noun

 * 1)  Christ

Translations

 * Finnish:

Etymology 6
From, due to the X symbol being a cross saltire.

Noun

 * 1)  Cross, crossing.

Translations

 * Finnish: ;

Noun

 * 1) X

Usage notes

 * In the German-based spelling, x is the default spelling for, but not the most frequent spelling. Following the German cognate or otherwise when there is an intervening morpheme boundary, the spellings chs, cks, ks (possibly also ggs) may be used instead.
 * In the Dutch-based spelling, is usually represented by ks. The letter x occurs only rarely in loanwords.
 * X is never doubled and preceding vowels are short unless they are themselves doubled (as in English).

Letter

 * 1)  The letter that represents a diacritic in the x-system, written after the letter in its non-diacriticed form; it is called.
 * &rarr;

Usage notes

 * Used only in loanwords. In more established loanwords, it is replaced with ks.

Noun

 * 1) X-frame stool
 * 1) X-frame stool

Adjective

 * 1) X-rated

Letter

 * 1) the twenty-fourth letter of the Latin alphabet, called  in Italian

Usage notes

 * The letter X is not considered part of the Italian alphabet. It is found mainly in loanwords, Latinisms, and Grecisms.

Etymology
From ×.

Symbol

 * 1) false.

Etymology
Borrowed from, which represented /ks/ in the dialects of most of the Greek mainland and Euboea.

Pronunciation
The sound of X was like that of the Greek, that is /ks/, although etymologically it represented not only cs (as in , from luc-s, and , from dic-si), but also gs (as in , from leg-s; , from reg-si); hs (as in , from trah-si; , from veh-si); and chs (as in the word , from onych-s, borrowed from the Greek). The hardening of a softer final (g, h, ch) before s into the с sound, which occurs in the last-mentioned cases, is found also in several roots ending in v and u: for niv-s,  for viv-si,  for conniv-si,  for fluv-si, from  (root fluv-; compare ),  for stru-si.

Less frequently x has arisen from the combinations ps and ts: for prop-simus (from ),  for nit-sus (from ), the latter being used along with the collateral form, as also  with , and  (from ) with.

An exchange of the sounds ss or s and x, took place in for assis and  for lassus. In the later language of the vulgar, the guttural sound in x disappeared, and s or ss was often written for it; as vis for, visit for , unsit for , conflississet for , in late inscriptions; hence regularly in Italian, and frequently in the other Romance tongues, the Latin x is represented by s or ss.

By a mere graphic variation, one of the constituent sounds of x is often expressed in inscriptions (but not the earliest) by an additional с or s; as SACXO or SAXSO for ; VCXOR or VXSOR for ; CONIVNCX or CONIVNXS for ; even both sounds are sometimes thus expressed, VICXSIT for.

Letter

 * 1) the 24th letter of the Norwegian alphabet

Usage notes
Mostly used in loan words and foreign names. Also used in old inscriptions and texts instead of ks.

Usage notes

 * 1) The fifth letter of the Somali alphabet, which follows Arabic abjad order. It is preceded by J and followed by KH.

Etymology
. Each pronunciation has a different source:
 * Filipino alphabet pronunciation is influenced by.
 * Abecedario pronunciation is from.

Usage notes

 * This letter is mostly used only in proper nouns, unadapted loanwords, or Spanish-based spellings.