Search by letter: X
Search by letter
Search by letter: X
- X (letter): pronunciation, history, forms and common uses X
- X — Chris Brown album X (Chris Brown album)
- X (Kylie Minogue album)
- X chromosome — the mammalian sex chromosome and its biological roles X chromosome
- X Factor: talent show franchise, idiom, and Iron Maiden album X Factor
- X Japan — Japanese rock band and visual kei pioneers X Japan
- X rating (film classification) X rating
- X Window System (X11): networked windowing for Unix-like systems X Window System
- X-DuckX (animated series) X-DuckX
- X-intercept (Cartesian graph) x-intercept
- X-Men (Marvel Comics): Mutant Superheroes, Themes, and Cultural Impact X-Men
- X-Men (2000 film) X-Men (movie)
- X-rays: electromagnetic radiation — wavelengths, interactions, imaging and medical uses X-ray
- X-ray crystallography: determining molecular arrangements by diffraction X-ray crystallography
- X-wing starfighter X-wing fighter
- X.509: Public Key Certificate Standard X.509
- X.Org Foundation: nonprofit steward of the X Window System and X.Org Server X.Org Foundation
- X&Y (Coldplay album) X&Y (album)
- X2 (2003 film) X2 (movie)
- x64 (x86-64): the 64-bit extension of the x86 architecture X64
- x86: Overview, history, architecture, and modern uses x86
- Xabi Alonso — Spanish midfielder and football manager Xabi Alonso
- Xabier (Javier) Arzalluz Antia — Basque political leader and jurist Xabier Arzalluz
- Xalapa — capital city of Veracruz, Mexico Xalapa
- Xanadu (1980 film) Xanadu (movie)
- Xanana Gusmão
- Xanten: Roman roots and medieval centre in North Rhine-Westphalia Xanten
- Xanthan gum: microbial polysaccharide used as thickener and stabilizer Xanthan gum
- Xanthi (regional unit)
- Xanthophylls (yellow carotenoid pigments) Xanthophyll
- Xanton-Chassenon — commune in Vendée, Pays de la Loire Xanton-Chassenon
- Xaver Schlager
- Xavi — Spanish midfielder and football manager Xavi
- Xavier Atencio: Animator, Imagineer, and Theme Park Storyteller Xavier Atencio
- Xavier Becerra
- Xavier Bettel — Prime Minister of Luxembourg Xavier Bettel
- Xavier Dor — French embryologist and anti-abortion activist Xavier Dor
- Xavier Rudd: Australian multi‑instrumentalist, activist, and festival performer Xavier Rudd
- Xavier Tilliette: French Jesuit Philosopher, Historian and Theologian Xavier Tilliette
- Xavier Tondo — Spanish professional road cyclist (1978–2011) Xavier Tondo
- Xavier Trias i Vidal de Llobatera Xavier Trias
- Xavier University — Jesuit Catholic University in Norwood, Ohio Xavier University
- Xavier Woods (Austin Watson) — Professional wrestler, entertainer, and media creator Xavier Woods
- Xbox — Microsoft’s video game console brand Xbox
- Xbox (original console) Xbox (console)
- Xbox 360
- Xbox Game Studios
- Xbox Live — Microsoft's online gaming and social service Xbox Live
- Xbox Live Marketplace
- Xbox Live Vision (webcam for Xbox 360) Xbox Live Vision
- Xbox One
- Xbox One X (Project Scorpio): Technical Overview and History Xbox One X
- Xbox Series X and Series S: Overview, hardware, features and differences Xbox Series X and Series S
- Xcel Energy Center (Saint Paul arena) Xcel Energy Center
- Xcelerator — launched steel coaster at Knott's Berry Farm Xcelerator
- XChat — graphical IRC client for Unix-like systems and Windows XChat
- Xenacoelomorpha: simple bilaterians and their place in animal evolution Xenacoelomorpha
- Xenarthra: the armadillos, sloths, and anteaters of the Americas Xenarthra
- Xenia, Illinois
- Xenia, Ohio
- Xenocide (novel by Orson Scott Card) Xenocide
- Xenogears: overview of the Square role‑playing game and its themes Xenogears
- Xenolith (geology) Xenolith
- Xenon — properties, history, compounds and applications Xenon
- Xenophanes of Colophon: poet, critic, and early Greek philosopher Xenophanes
- Xenophilius Lovegood (fictional character) Xenophilius Lovegood
- Xenophobia: definitions, causes, history, impacts and responses Xenophobia
- Xenophon of Athens: soldier, historian, and student of Socrates Xenophon
- Xenopus: African clawed frogs and their role in research and ecology Xenopus
- Xenotransplantation: cross‑species transplantation of cells, tissues and organs Xenotransplantation
- Xenoturbella — simple marine deuterostome worms and their biology Xenoturbella
- Xenu — figure in Scientology cosmology Xenu
- Intel Xeon processors Xeon
- Xeranthemum — Mediterranean everlasting flowers Xeranthemum
- Xerez C.D.: Football club from Jerez de la Frontera, Spain Xerez CD
- Xerochrysum — Australian everlastingflowers genus Xerochrysum
- Xerochrysum bicolor — a Tasmanian coastal everlasting daisy Xerochrysum bicolor
- Xerochrysum bracteatum — golden everlasting (strawflower) Xerochrysum bracteatum
- Xerophile — organisms adapted to very dry conditions Xerophile
- Xerophyte: plants adapted to dry environments Xerophyte
- Xerox: American document technology company and iconic brand Xerox
- Xerxes
- Xevious: pioneering vertical-scrolling shooter from Namco Xevious
- Xfce — lightweight desktop environment for Unix-like systems Xfce
- XFL (2001) — Vince McMahon’s original professional American football league XFL
- Xherdan Shaqiri: Swiss attacking midfielder and winger Xherdan Shaqiri
- Xhosa (isiXhosa): a Nguni Bantu language of South Africa Xhosa language
- Xhosa people (amaXhosa): language, clans, history and culture Xhosa people
- XHTML: the XML-based reformulation of HTML XHTML
- Xi (Ξ, ξ): the fourteenth Greek letter — form, history and uses Xi
- Xi Jinping: China's paramount leader and General Secretary Xi Jinping
- Xi Shun (Bao Xishun): Chinese man once listed as the world's tallest living person Xi Shun
- Xi Zhongxun
- Xi'an — Ancient Chinese capital and home of the Terracotta Army Xi'an
- Xi'an–Yuxia Railway (Xi'an–Huxian): suburban branch line serving Xi'an districts Xi'an-Yuxia Railway
- Xia dynasty (c. 2100–1600 BCE) — early Chinese dynasty and legend Xia dynasty
- Xiang Shouzhi (1917–2017): Chinese People's Liberation Army General Xiang Shouzhi
- Xiangqi (Chinese chess) Xiangqi
- Xiangsheng (Crosstalk): Traditional Chinese Comic Dialogue Xiangsheng
- Xiao Yang (judge)
- Xiaolongbao: Chinese soup dumplings from the Jiangnan region and Shanghai Xiaolongbao
- Xiaosaurus — small mid-Jurassic ornithischian dinosaur Xiaosaurus
- Xiaotingia — a small feathered theropod from the Jurassic of China Xiaotingia
- Xiluodu Dam
- Xincheng District (Xi'an) — overview, geography, history and role Xincheng District
- Xindian City (Xindian District) — geography, history, and key features Xindian City
- Xinhua News Agency — China's official state news agency and media organization Xinhua News Agency
- Xinjiang: geography, peoples, history and regional significance Xinjiang
- Xinxiang — prefecture-level city in northern Henan, China Xinxiang
- Xinyang — prefecture-level city in southern Henan, China Xinyang
- Xinyi District, Taipei Xinyi District
- Xiongnu: nomadic confederation of the Eurasian steppe Xiongnu
- Xipaya language (Xipaia, Shipaja) Xipaya language
- Xiphactinus — Large predatory fish of the Late Cretaceous seas Xiphactinus
- Xiphosura: horseshoe crabs and their extinct relatives Xiphosura
- Xiumin (Kim Min-seok) — South Korean singer, dancer and actor Xiumin
- xkcd — webcomic by Randall Munroe xkcd
- XLR connector
- XM8 rifle: a lightweight 5.56 mm modular weapon developed by Heckler & Koch XM8 rifle
- XML — The Extensible Markup Language XML
- XNOR gate (logical equivalence) — definition, behavior, and uses XNOR gate
- XO (Leathermouth album)
- Xochiquetzal: Aztec goddess of flowers, fertility, and the arts Xochiquetzal
- Xoloitzcuintle (Xolo) — the Mexican hairless dog Xoloitzcuintle
- Exclusive OR (XOR) gate XOR gate
- XOXO (EXO album, 2013) XOXO
- Xscape (posthumous album by Michael Jackson) Xscape (album)
- Xserve — Apple's rack‑mounted server line Xserve
- XSL attack (eXtended Sparse Linearization) — algebraic cryptanalysis of block ciphers XSL attack
- XSLT — Extensible Stylesheet Language Transformations XSLT
- XTC (English rock band) XTC
- XTRA Airways
- Xu Caihou: Chinese general, Politburo member and former Vice Chairman of the CMC Xu Caihou
- Xu Chongde — Chinese constitutional scholar and legal educator Xu Chongde
- Xu Guangxian — Pioneer of Chinese Rare‑Earth Chemistry Xu Guangxian
- Xu Jiatun
- Xu Xin — Chinese table tennis player and modern penhold specialist Xu Xin
- Xu Zhimo: Chinese poet and a key voice in modern Chinese poetry Xu Zhimo
- Xuanwu District, Nanjing: history, landmarks and institutions Xuanwu District
- Xuanwu Lake — historic urban lake in Nanjing Xuanwu Lake
- Xuanzang — Tang dynasty Buddhist pilgrim, scholar and translator Xuanzang
- Xubuntu
- Xuchang — Central Henan City and Historical Capital Xuchang
- XXXTentacion (Jahseh Onfroy) — American rapper and singer XXXTentacion
- Xylem: structure, function, and role in vascular plants Xylem
- Xylophone: pitched percussion instrument and its history, construction, and use Xylophone
- XYZ Affair
- Xzibit: rapper, actor and television host Xzibit