X - wikipedia X This article is about the letter. For the multiplication sign, see Multiplication sign. For other uses, see X ( disambiguation ). ISO basic Latin alphabet Aa Bb Cc Dd Ee Ff Gg Hh Ii Jj Kk Ll Mm Nn Oo Pp Qq Rr Ss Tt Uu Vv Ww Xx Yy Zz Writing cursive forms of X X ( named ex / ɛks /, plural exes ) is the 24th and antepenultimate letter in the modern English alphabet and the ISO basic Latin alphabet. Contents 1 History 2 Use in writing systems 2.1 English 2.2 Other languages 2.3 Other systems 3 Other uses 4 Related characters 4.1 Descendants and related characters in the Latin alphabet 4.2 Ancestors and siblings in other alphabets 5 Computing codes 6 Other representations 7 See also 8 References 9 External links History Greek Chi Etruscan : X In Ancient Greek, ' Χ ' and ' Ψ ' were among several variants of the same letter, used originally for / kh / and later, in western areas such as Arcadia, as a simplification of the digraph ' ΧΣ ' for / ks /. In the end, more conservative eastern forms became the standard of Classical Greek, and thus ' Χ ' ( Chi ) stands for / kh / ( later / x / ). However, the Etruscans had taken over ' Χ ' from western Greek, and it therefore stands for / ks / in Etruscan and Latin. The letter ' Χ ' ~ ' Ψ ' for / kh / was a Greek addition to the alphabet, placed after the Semitic letters along with phi ' Φ ' for / ph /. ( The variant ' Ψ ' later replaced the digraph ' ΦΣ ' for / ps / ; omega was a later addition ). Use in writing systems English In English orthography, ⟨ x ⟩ is typically pronounced as the voiceless consonant cluster / ks / when it follows the stressed vowel ( e.g. ox ), and the voiced consonant / ɡz / when it precedes the stressed vowel ( e.g. exam ). It is also pronounced / ɡz / when it precedes a silent ⟨ h ⟩ and a stressed vowel ( e.g. exhaust ). Before ⟨ i ⟩ or ⟨ u ⟩, it can be pronounced / kʃ / or / ɡʒ / ( e.g. sexual and luxury ) ; these result from earlier / ksj / and / ɡzj /. It also makes the sound / kʃ / in words ending in - xion ( typically used only in British - based spellings of the language ; American spellings tend to use - ction ). When ⟨ x ⟩ ends a word, it is always / ks / ( e.g. ax ), except in loan words such as faux ( see French, below ). There are very few English words that start with ⟨ x ⟩ ( the fewest number of any letter ). When ⟨ x ⟩ does start a word, it is usually pronounced / z / ( e.g. xylophone, xenophobia, and xanthan ) ; in rare recent loanwords or foreign proper names, it can also be pronounced / s / ( e.g. the obsolete Vietnamese monetary unit xu ) or / ʃ / ( e.g. Chinese names starting with Xi like Xiaomi or Xinjiang ). Many of the words that start with ⟨ x ⟩ are of Greek origin, or standardized trademarks ( Xerox ) or acronyms ( XC ). In abbreviations, it can represent `` trans - '' ( e.g. XMIT for transmit, XFER for transfer ), `` cross - '' ( e.g. X-ing for crossing, XREF for cross-reference ), `` Christ - '' as shorthand for the labarum ( e.g. Xmas for Christmas, Xian for Christian ), the `` crys - '' in crystal ( XTAL ), or various words starting with `` ex - '' ( e.g. XL for extra large, XOR for exclusive - or ). X is the third least frequently used letter in English ( after ⟨ q ⟩ and ⟨ z ⟩ ), with a frequency of about 0.15 % in words. Other languages In Latin, ⟨ x ⟩ stood for ( ks ). In some languages, as a result of assorted phonetic changes, handwriting adaptations or simply spelling convention, ⟨ x ⟩ has other pronunciations : Basque : as a spelling for ( ʃ ). Additionally there is the digraph ⟨ tx ⟩ ( tʃ ). Dutch : ⟨ x ⟩ usually represents ( ks ), except in the name of the island of Texel, which is pronounced Tessel. This is because of historical sound - changes in Dutch, where all / ks / sounds have been replaced by / s / sounds. Words with an ⟨ x ⟩ in the Dutch language are nowadays usually loanwords. In the Dutch - speaking part of Belgium, family names with ⟨ x ⟩ are not uncommon ( e.g. Dierckx, Hendrickx, Koninckx, Sterckx, Vranckx ). In Norwegian, ⟨ x ⟩ is generally pronounced ( ks ), but since the 19th century, there has been a tendency to spell it out as ' ks ' ; it may still be retained in personal names, though it is fairly rare, and occurs mostly in foreign words and SMS language. Usage in Danish, German and Finnish is similar. French : at the ends of words, silent ( or ( z ) in liaison if the next word starts with a vowel ). Three exceptions are pronounced ( s ) : six ( `` six '' ), dix ( `` ten '' ) and in some city names such as Bruxelles ( although some people still pronounce it ' ks ' ) or Auxerre ; it is fully pronounced ( ks ) in Aix - la - Chapelle. It is pronounced ( z ) in sixième and dixième. In Italian, ⟨ x ⟩ is either pronounced ( ks ), as in extra, uxorio, xilofono, or ( ɡz ), as exogamia, when it is preceded by ⟨ e ⟩ and followed by a vowel. In several related languages, notably Venetian, it represents the voiced sibilant ( z ). It is also used, mainly amongst the young people, as a short written form for `` per '', meaning `` for '' : for example, `` x sempre '' ( `` forever '' ). This because in Italian the multiplication sign ( similar to ⟨ x ⟩ ) is called `` per ''. However, ⟨ x ⟩ is found only in loanwords, as it is not part of the standard Italian alphabet ; in most words with ⟨ x ⟩, this letter may be replaced with ' s ' or ' ss ' ( with different pronunciation : xilofono / silofono, taxi / tassì ) or, rarely, by ' cs ' ( with the same pronunciation : claxon / clacson ). In Old Spanish, ⟨ x ⟩ was pronounced ( ʃ ), as it is still currently in other Iberian Romance languages. Later, the sound evolved to a hard ( x ) sound. In modern Spanish, due to a spelling reform, whenever ⟨ x ⟩ is used for the ( x ) sound it has been replaced with ⟨ j ⟩, including in words that originally had ⟨ x ⟩ such as ejemplo or ejercicio, though ⟨ x ⟩ is still retained for some names ( notably ' México ', even though ' Méjico ' may sometimes be used in Spain ). Presently, ⟨ x ⟩ represents the sound ( s ) ( word - initially ), or the consonant cluster ( ks ) ( e.g. oxígeno, examen ). Rarely, it can be pronounced ( ʃ ) as in Old Spanish in some proper nouns such as ' Raxel ' ( a variant of Rachel ) and Uxmal. In Galician and Leonese, ⟨ x ⟩ is pronounced ( ʃ ) in most cases. In learned words, such as ' taxativo ' ( taxing ), it is pronounced ( ks ). However, Galician speakers tend to pronounce it ( s ), especially when it appears before plosives, such as in ' externo ' ( external ). In Catalan, ⟨ x ⟩ has three sounds ; the most common is ( ʃ ) ; as in ' xarop ' ( syrup ). Other sounds are : ( ks ) ; ' fixar ' ( to fix ), ( ɡz ) ; ' examen '. In addition, ( ʃ ) gets voiced to ( ʒ ) before voiced consonants ; ' caixmir '. Catalan also has the digraph ⟨ tx ⟩, pronounced ( tʃ ). In Portuguese, ⟨ x ⟩ has four main sounds ; the most common is ( ʃ ), as in ' xícara ' ( cup ). The other sounds are : ( ks ) as in ' flexão ' ( flexion ) ; ( s ), when preceded by E and followed by a consonant, as in ' contexto ' ( ( ʃ ) in European Portuguese ), and in a small number of other words, such as ' próximo ' ( close / next ) ; and ( the rarest ) ( z ), which occurs in the prefix ' ex - ' before a vowel, as in ' exagerado ' ( exaggerated ). A rare fifth sound is ( ɡz ), coexisting with ( z ) and ( ks ) as acceptable pronunciations in exantema and in words with the Greek prefix ' hexa - '. In Venetian, it represents the voiced alveolar sibilant ( z ) much like in Portuguese ' exagerado ', English ' xylophone ' or in the French ' sixième '. Examples from medieval texts include raxon ( reason ), prexon ( prison ), dexerto ( desert ), chaxa / caxa ( home ). Nowadays, the best - known word is xe ( is / are ). The most notable exception to this rule is the name Venexia ( veˈnɛsja ) in which ⟨ x ⟩ has evolved from the initial voiced sibilant ( z ) to the present day voiceless sibilant. In Albanian, ⟨ x ⟩ represents ( dz ), while the digraph ⟨ xh ⟩ represents ( dʒ ). In Maltese, ⟨ x ⟩ is pronounced ( ʃ ) or, in some cases, ( ʒ ) ( only in loanwords such as ' televixin ', and not for all speakers ). In Polish, ⟨ x ⟩ was used prior to 19th century both in loanwords and native words and was pronounced ( ks ) or ( gz ), e.g. xiążę, xięstwo ( now książę, księstwo ). Later was replaced by ⟨ ks ⟩ and ⟨ gz ⟩ in all words and remained only in surnames as Axentowicz, Jaxa, Koxowski, Mixtacki, Rexemowski, Xiężopolski, names as Xawery, Xymena and abbreviations. Additionally, in languages for which the Latin alphabet has been adapted only recently, ⟨ x ⟩ has been used for various sounds, in some cases inspired by European usage, but in others, for consonants uncommon in Europe. For these no Latin letter stands out as an obvious choice, and since most of the various European pronunciations of ⟨ x ⟩ can be written by other means, the letter becomes available for more unusual sounds. ⟨ x ⟩ represents ( x ) ( voiceless velar fricative ) or ( ꭓ ) ( voiceless uvular fricative ) in e.g. Azerbaijani, Kurdish, Lojban, Tatar, Uzbek, Pashto and Uyghur ( Latin script ). Esperanto : The x-convention replaces ⟨ ĉ ⟩, ⟨ ĝ ⟩, ⟨ ĥ ⟩, ⟨ ĵ ⟩, ⟨ ŝ ⟩, and ⟨ ŭ ⟩ with x-suffixes : ⟨ cx ⟩, ⟨ gx ⟩, ⟨ hx ⟩, ⟨ jx ⟩, ⟨ sx ⟩, and ⟨ ux ⟩. In transliteration of Indian languages, ⟨ x ⟩ represents the consonant cluster ( kʃ ) in alternate spellings of words containing ' क्ष ' ( kṣ ), especially names such as Laxmi and Dixit. Less frequently, ⟨ x ⟩ is used to represent ' ख़ ' ( x ). In Apache ⟨ x ⟩ represents ( x ) In Nahuatl, ⟨ x ⟩ represents ( ʃ ). In Nguni languages, ⟨ x ⟩ represents the alveolar lateral click ( ǁ ). In Pirahã, ⟨ x ⟩ symbolizes the glottal stop ( ʔ ). An illustrating example of `` x '' as a `` leftover '' letter is differing usage in three different Cushitic languages : Afar : voiced alveolar implosive ( ɗ ) Oromo : alveolar ejective ( tʼ ) Somali : voiceless pharyngeal fricative ( ħ ) In Southeast Asia : In Lao, based on romanization of Lao consonants, ⟨ x ⟩ may represent ( ɕ ), e.g. in Lan Xang. In Vietnamese, ⟨ x ⟩ is pronounced like English ⟨ s ⟩ ( at the beginning of a word, e.g. `` sing '' ). This sound was ( ɕ ) in Middle Vietnamese, resembling the Portuguese sound / ʃ /, spelled ⟨ x ⟩. In Hanyu Pinyin, Standard Chinese 's official transcription system in China, Malaysia, Singapore, and Taiwan, the letter ⟨ x ⟩ represents the voiceless alveolo - palatal fricative / ɕ /, for instance in ' Xi ', ( ɕi ). This sound somewhat resembles ( ʃ ). Other systems In the International Phonetic Alphabet, ⟨ x ⟩ represents a voiceless velar fricative. Other uses In mathematics, x is commonly used as the name for an independent variable or unknown value. The modern tradition of using x to represent an unknown was introduced by René Descartes in La Géométrie ( 1637 ). As a result of its use in algebra, X is often used to represent unknowns in other circumstances ( e.g. X-rays, Generation X, The X-Files, and The Man from Planet X ; see also Malcolm X ). In the Cartesian coordinate system, x is used to refer to the horizontal axis. It may also be used as a typographic approximation for the multiplication sign. In mathematical typesetting, x meaning an algebraic variable is normally in italic type ( x ( displaystyle x ! ) ), partly to avoid confusion with the multiplication symbol. In fonts containing both x ( the letter ) and × ( the multiplication sign ), the two glyphs are dissimilar. It can be used as an abbreviation for ' between ' in the context of historical dating ; e.g., ' 1483 x 1485 '. Maps and other images sometimes use an X to label a specific location, leading to the expression `` X marks the spot ''. The Roman numeral X represents the number 10. In art or fashion, the use of X indicates a collaboration by two or more artists, e.g. Aaron Koblin x Takashi Kawashima. This application, which originated in Japan, now extends to other kinds of collaboration outside the art world. Related characters Descendants and related characters in the Latin alphabet X with diacritics : Ẍ ẍ Ẋ ẋ ᶍ IPA - specific symbols related to X : χ Teuthonista phonetic transcription - specific symbols related to X : U + AB56 ꭖ LATIN SMALL LETTER X WITH LOW RIGHT RING U + AB57 ꭗ LATIN SMALL LETTER X WITH LONG LEFT LEG U + AB58 ꭘ LATIN SMALL LETTER X WITH LONG LEFT LEG AND LOW RIGHT RING U + AB59 ꭙ LATIN SMALL LETTER X WITH LONG LEFT LEG WITH SERIF x : Modifier letter small x is used for phonetic transcription x : Subscript small x is used in Indo - European studies Ancestors and siblings in other alphabets Χ χ : Greek letter Chi, from which the following derive : Х х : Cyrillic letter Kha Ⲭ ⲭ : Coptic letter Khe, which derives from Greek Chi 𐍇 : Gothic letter enguz, which derives from Greek Chi 𐌗 : Old Italic X, which derives from Greek Chi, and is the ancestor of modern Latin X ᚷ : Runic letter Gyfu, which may derive from old Italic X Ξ ξ : Greek letter Xi, which was used in place of Chi in the Eastern ( and the modern ) Greek alphabets Computing codes Character X x Unicode name LATIN CAPITAL LETTER X LATIN SMALL LETTER X Encodings decimal hex decimal hex Unicode 88 U + 0058 120 U + 0078 UTF - 8 88 58 120 78 Numeric character reference & # 88 ; & # x58 ; & # 120 ; & # x78 ; EBCDIC family 231 E7 167 A7 ASCII 88 58 120 78 Also for encodings based on ASCII, including the DOS, Windows, ISO - 8859 and Macintosh families of encodings. In the C programming language, ' x ' preceded by zero ( 0x or 0X ) is used to denote hexadecimal literal values. Other representations NATO phonetic Morse code X-ray -- -- Signal flag Flag semaphore American manual alphabet ( ASL fingerspelling ) Braille dots - 1346 See also XX XXX XXXX X mark Commonly used as a prefix term in nouns related to the X Window System and Unix References Jump up ^ `` X '', Oxford English Dictionary, 2nd edition ( 1989 ) ; Merriam - Webster 's Third New International Dictionary of the English Language, Unabridged ( 1993 ) ; `` ex '', op. cit. Jump up ^ Venezky, Richard ( 1 January 1970 ). The Structure of English Orthography. Walter de Gruyter. p. 40. ISBN 978 - 3 - 11 - 080447 - 8. Jump up ^ Mička, Pavel. `` Letter frequency ( English ) ''. Algoritmy.net. Retrieved 9 February 2014. Jump up ^ `` Dizionario di ortografia e pronunzia '' ( Dictionary of Spelling and preliminary ). Dizionario di ortografia e pronunzia ( in Italian ). Retrieved 9 February 2014. Jump up ^ Cajori, Florian ( 1928 ). A History of Mathematical Notations. Chicago : Open Court Publishing. p. 381. See History of algebra. Jump up ^ `` X marks the spot ''. Retrieved 21 June 2016. Jump up ^ Gordon, Arthur E. ( 1983 ). Illustrated Introduction to Latin Epigraphy. University of California Press. p. 44. Retrieved 3 October 2015. Jump up ^ King, David A. ( 2001 ). The Ciphers of the Monks. p. 282. In the course of time, I, V and X became identical with three letters of the alphabet ; originally, however, they bore no relation to these letters. Jump up ^ http://arkitip.com/product/x-mark-of-collaboration-issue-no-0053x/ Jump up ^ Constable, Peter ( 2004 - 04 - 19 ). `` L2 / 04 - 132 Proposal to add additional phonetic characters to the UCS '' ( PDF ). Jump up ^ Everson, Michael ; Dicklberger, Alois ; Pentzlin, Karl ; Wandl - Vogt, Eveline ( 2011 - 06 - 02 ). `` L2 / 11 - 202 : Revised proposal to encode `` Teuthonista '' phonetic characters in the UCS '' ( PDF ). Jump up ^ Anderson, Deborah ; Everson, Michael ( 2004 - 06 - 07 ). `` L2 / 04 - 191 : Proposal to encode six Indo - Europeanist phonetic characters in the UCS '' ( PDF ). External links Media related to X at Wikimedia Commons The dictionary definition of X at Wiktionary The dictionary definition of x at Wiktionary `` X ''. The American Cyclopædia. 1879. Latin script History Spread Romanization Roman numerals Alphabets ( list ) Classical Latin alphabet ISO basic Latin alphabet phonetic alphabets International Phonetic Alphabet X-SAMPA spelling alphabets Letters ( list ) Letters of the ISO basic Latin alphabet Aa Bb Cc Dd Ee Ff Gg Hh Ii Jj Kk Ll Mm Nn Oo Pp Qq Rr Ss Tt Uu Vv Ww Xx Yy Zz Letter X with diacritics X́x́ X̂x̂ Ẍẍ X̌x̌ Ẋẋ X̧x̧ X̱x̱ X̣x̣ ᶍ Multigraphs Digraphs ch cz dž dz gh ij ll ly nh ny sh sz th Trigraphs dzs eau Tetragraphs ough Pentagraphs tzsch Keyboard layouts ( list ) QWERTY QWERTZ AZERTY Standards ISO / IEC 646 Unicode Western Latin character sets Lists precomposed Latin characters in Unicode letters used in mathematics Diacritics Palaeography Retrieved from `` https://en.wikipedia.org/w/index.php?title=X&oldid=807244108 '' Categories : ISO basic Latin letters Placeholder names Hidden categories : CS1 Italian - language sources ( it ) Wikipedia indefinitely move - protected pages All articles with unsourced statements Articles with unsourced statements from July 2013 Articles containing Basque - language text Articles containing Dutch - language text Articles containing French - language text Wikipedia articles incorporating a citation from The American Cyclopaedia Wikipedia articles incorporating a citation from The American Cyclopaedia with a Wikisource reference Talk Contents About Wikipedia Acèh Afrikaans Alemannisch አማርኛ Aragonés ܐܪܡܝܐ Asturianu Avañe'ẽ Azərbaycanca تۆرکجه Bân - lâm - gú Беларуская Беларуская ( тарашкевіца ) ‎ Български Brezhoneg Català Чӑвашла Čeština Corsu Cymraeg Dansk Deutsch Eesti Ελληνικά Español Esperanto Euskara فارسی Føroyskt Français Frysk Furlan Gaeilge Gaelg Gàidhlig Galego 贛 語 Хальмг 한국어 Հայերեն Hrvatski Ido Ilokano Bahasa Indonesia Íslenska Italiano עברית ქართული Kernowek Kiswahili Коми Kreyòl ayisyen Kurdî Latina Latviešu Lietuvių Magyar Македонски Bahasa Melayu Mìng - dĕ̤ng - ngṳ̄ Nāhuatl Nederlands 日本 語 Nordfriisk Norsk Norsk nynorsk Nouormand Occitan Олык марий Oʻzbekcha / ўзбекча ਪੰਜਾਬੀ Polski Português Română Runa Simi Русский Sardu Scots Seeltersk Simple English Slovenčina Slovenščina Sranantongo Српски / srpski Basa Sunda Suomi Svenska Tagalog Татарча / tatarça ไทย Türkçe Українська Tiếng Việt Volapük Winaray ייִדיש Yorùbá 粵語 Zazaki Žemaitėška 中文 Edit links This page was last edited on 26 October 2017, at 20 : 09. 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Question: when does an x sound like a z
Answer: When ⟨x⟩ does start a word; When ⟨x⟩ does start a word