Middle School Vocabulary

114,351 words and 1,048 expressions at the middle school level.

X'masname

Alternative form of Xmas.

X-Actoname

A utility knife, usually with a short, sharp, disposable blade mounted on a pen-like body, usually for crafts and hobbies; an X-Acto knife.

X-ALDnoun

Initialism of X-linked adrenoleukodystrophy.

x-axesnoun

plural of x-axis

x-axisnoun

The axis on a graph that is usually drawn left to right and usually shows the range of values of an independent variable.

x-bandnoun

An ultrahigh radio frequency, one within the range of 8.0 to 12.0 GHz.

X-barnoun

A phrase, or, equivalently, a node in a syntax tree, which consists either of: (1) an adjunct and another X-bar phrase, (2) a head, X, and an optional complement, or (3) a conjunction sandwiched between two other X-bars. The X is a "pro-letter" which can be substituted by letters such as N for noun, V for verb, P for preposition, I for inflectional, etc.

X-boxnoun

Misspelling of Xbox.

X-Dayname

1 November 1945, the planned date for the Allied invasion of Kyushu in southwestern Japan in World War II (cancelled following Japan's unconditional surrender in September 1945).

X-Daysnoun

plural of X-Day

x-div.adj

Abbreviation of ex dividend.

X-galnoun

5-bromo-4-chloro-3-indolyl-β-D-galactopyranoside, used to detect β-galactosidase.

x-ingnoun

Alternative form of xing.

X-masname

Alternative form of Xmas.

x-overnoun

Abbreviation of crossover.

x-platadj

Abbreviation of cross-platform.

x-postnoun

Alternative form of xpost.

X-raynoun

Short wavelength electromagnetic radiation usually produced by bombarding a metal target in a vacuum. Used to create images of the internal structure of objects; this is possible because X-rays pass through most objects and can expose photographic film.

X-raysnoun

plural of X-ray

X-ringnoun

A circle in the middle of a shooting target's bullseye used to determine the winner in the event of a tie.

x-risknoun

Initialism of existential risk.

X-talknoun

Abbreviation of crosstalk.

X-treenoun

A data structure based on the R-tree, used for storing data in many dimensions.

x-wingnoun

An aircraft wing design with two wings making an X form in the horizontal plane.

x-wordnoun

The word xenophobia.

x86-16name

The original 16-bit-only version of the x86 instruction set architecture.

x86-32name

The 32-bit version of the x86 instruction set architecture.

x86-64name

A superset of the x86 instruction set architecture, providing additional support for 64-bit addressing while remaining mostly backward compatible with older applications.

XACMLnoun

Initialism of eXtensible Access Control Markup Language.

xacutinoun

A Goan curry with a complex mixture of spices including white poppy seeds and large dried red chilis, usually prepared with chicken or lamb.

Xakasnoun

Alternative form of Khakas.

xalamnoun

A traditional lutelike string instrument of West Africa.

xalamsnoun

plural of xalam

Xalapaname

A city in Veracruz, Mexico.

xalwonoun

A type of halva, a staple of Somali cuisine, made from sugar, corn starch, cardamon powder, nutmeg powder, ghee, and sometimes peanuts.

Xamarname

Mogadishu (the capital city of Somalia).

Xamirnoun

A small ethnic group of Ethiopia, speaking the Xamtanga language.

XAMPPname

A cross-platform solution stack consisting of the Apache web server, MariaDB or MySQL database, and Perl and PHP programming languages.

Xanaduname

The summer capital of the Yuan dynasty, now an archaeological site in Zhenglan, Xilingol, Inner Mongolia, China.

Xanaxname

A brand name for alprazolam.

Xandername

A diminutive of the male given name Alexander, from Ancient Greek, of modern usage.

Xandraname

A female given name from Ancient Greek of modern usage, a short form of Alexandra.

Xaniesnoun

plural of Xany

xanithnoun

Alternative form of khanith.

xannedadj

Alternative letter-case form of Xanned.

xannynoun

Alternative form of Xanny.

xanolnoun

A sodium salicylate preparation used as an antirheumatic.

Xanreyname

A commune of Moselle department, France.

Xansiname

Alternative form of Shanxi.

Xantenname

A town in North Rhine-Westphalia, Germany.

xanth-prefix

Alternative form of xantho- before a vowel

Xanthename

A female given name from Ancient Greek.

Xanthiname

A city in Thrace, northeastern Greece.

Xapuriname

a river in Acre, Brazil

xarquenoun

Archaic form of jerky.

Xarunname

The Daraawiish government.

xasernoun

An X-ray laser.

xasersnoun

plural of xaser

Xaviername

A male given name from Spanish [in turn from Basque].

Xayarname

A county of Aksu prefecture, Xinjiang autonomous region, China.

Xazarnoun

Alternative form of Khazar.

Xazarsnoun

plural of Xazar

xBasename

Any programming language that derives from, or is a clone of, the dBASE system.

XBLIGname

Initialism of Xbox Live Indie Games.

Xbonesnoun

plural of Xbone

XBONGnoun

Acronym of X-ray bright optically normal galaxy.

Xbotsnoun

plural of Xbot

xbowsnoun

plural of xbow

Xboxedverb

simple past and past participle of Xbox

Xboxesnoun

plural of Xbox

xbredadj

Abbreviation of crossbred.

xbredsnoun

plural of xbred

xbreednoun

Abbreviation of crossbreed.

Xcalakname

A village in Quintana Roo, Mexico.

Xcaretname

A Maya civilization archaeological site located on the Caribbean coastline of the Yucatán Peninsula, in the state of Quintana Roo in Mexico.

xcatiknoun

Alternative spelling of x-cat-ik.

XCIXthadj

Abbreviation of ninety-ninth; 99th.

XDR-TBnoun

Initialism of extensively drug resistant tuberculosis.

xdressverb

Abbreviation of cross-dress.

xebecnoun

A small two-masted, and later three-masted, Mediterranean transport ship with an overhanging bow and stern.

xebecknoun

Archaic form of xebec.

xebecsnoun

plural of xebec

xeetedverb

simple past and past participle of xeet

xeetsnoun

plural of xeet

xelodanoun

Synonym of capecitabine.

Xemb.name

Abbreviation of Xember.

Xembername

Alternative spelling of December.

xemesnoun

plural of xeme

Xenasnoun

plural of Xena

xenatenoun

The oxyanion of xenon HXeO₄⁻.

xenianoun

The concept of hospitality to strangers.

xenialadj

Hospitable, especially to visiting strangers or foreigners.

xeniasnoun

plural of xenia

xenicadj

Containing an unidentified organism, especially a bacterium.

xenicanoun

Any of various nymphalid butterflies of the genera Geitoneura, Oreixenica. and Nesoxenica.

xenidnoun

Synonym of diclofenac.

xenidenoun

A binary compound of xenon

xeniidnoun

Any soft coral in the family Xeniidae.

xenismnoun

A word used in utterances of a language but generally marked as foreign.

xeniumnoun

A gift or offering.

Xenixname

A version of the Unix operating system for various microcomputer platforms, licensed by Microsoft from AT&T Corporation in the late 1970s.

xeno-prefix

Having to do with foreigners.

xenomanoun

A growth caused by various protists and fungi, most notably microsporidia.

xenonsnoun

plural of xenon

xenopsnoun

Any of the tropical birds in the genera Xenops, Megaxenops and Microxenops, found in Central and South America.

Xensiname

Synonym of Shaanxi.

xenylnoun

The univalent radical derived from diphenyl.

xeralfnoun

A kind of alfisol found in areas with very dry summers and moist winters.

xerandnoun

A kind of andisol found in climates with very dry summers and moist winters.

xereptnoun

A kind of inceptisol found in areas with very dry summers and moist winters.

xerertnoun

A vertisol with cracks that are open for at least 60 consecutive days during the summer, but closed for at least 60 consecutive days during winter.

Xeresname

Obsolete form of Jerez (“Spanish city”).

xeri-prefix

dry; arid.

xericadj

Very dry, lacking humidity and water.

xerifnoun

Alternative spelling of shereef.

xeriffnoun

Obsolete form of ashrafi.

xerifsnoun

plural of xerif

xerifyverb

To make xeric (dry).

xero-prefix

dry; dryness

xerollnoun

A kind of mollisol found in areas with a xeric moisture regime.

xeromanoun

Dryness of the eye.

xeroxverb

To make a copy using a xerographer.

xerultnoun

A kind of ultisol found in areas with very dry summers and moist winters.

Xerxesname

Xerxes I, a Persian king of the Achaemenid dynasty who reigned 485-465 BC.

xfadenoun

Abbreviation of crossfade.

xfadedverb

simple past and past participle of xfade

xfadesnoun

plural of xfade

xfeednoun

Abbreviation of crossfeed.

xfeedsnoun

plural of xfeed

XFELsnoun

plural of XFEL

xfersnoun

plural of xfer

xformverb

Abbreviation of transform.

xformsverb

third-person singular simple present indicative of xform

xhairnoun

Crosshair, reticle.

Xhosanoun

A member of a Bantu people from South Africa, most of whom live in the Eastern Cape.

Xhosanadj

Of or pertaining to the Xhosa.

Xhosasnoun

plural of Xhosa

XHTMLname

Initialism of Extensible Hypertext Markup Language, a reformulation of HTML as an XML application.

Xi'anname

The provincial capital of Shaanxi, China; a subprovincial city in central China famed as the former capital of numerous Chinese dynasties, also known as Chang'an among other historical names.

Xiahename

A county of Gannan prefecture, Gansu, China.

Xialuname

A district of Huangshi, Hubei, China.

Xiamenname

A prefecture-level city and subprovincial city of Fujian, in southeastern China.

Xiangname

A Chinese language spoken mainly in Hunan province, China

Xiangsname

plural of Xiang

Xianjuname

A county of Taizhou, Zhejiang, China.

Xiansnoun

plural of Xian

Xiaominoun

An electronic product made by Xiaomi, especially a phone.

xiaosnoun

plural of xiao

Xiaoyiname

A county-level city of Lüliang, Shanxi, China.

xiapeinoun

A Chinese clothing accessory, in different periods taking the form of a long scarf, a neckband, or a waistcoat.

Xiapuname

A county of Ningde, Fujian, China.

Xiayiname

A county of Shangqiu, Henan, China.

Xicananoun

Alternative form of Chicana.

Xicanonoun

Alternative form of Chicano.

Xidenname

Joe Biden (born 1942), the 46th president of the United States, viewed as a pawn or tool of China.

xiezhinoun

A mythical creature resembling an ox or a goat, with thick dark fur covering its body, bright eyes and a single long horn on its forehead.

Xifengname

A county of Guiyang, Guizhou, China.

Xigangname

A district of Dalian, Liaoning, China.

Xigazêname

Alternative form of Shigatse.

Xigongname

A district of Luoyang, Henan, China.

xiguanoun

Watermelon.

xiguasnoun

plural of xigua

Xihuaname

A county of Zhoukou, Henan, China.

XIIIthadj

Abbreviation of thirteenth; 13th.

Xiismnoun

The political philosophy practised by Xi Jinping.

XIIthadj

Abbreviation of twelfth; 12th.

Xilingname

A district of Yichang, Hubei, China.

Xiluoname

Alternative form of Siluo

Ximananame

Alternative form of Yumana (“Arawakan language”).

Ximenaname

A female given name from Spanish or Basque.

Ximiaoname

A location in Ejin, Alxa, Inner Mongolia autonomous region, in northern China.

Xin'anname

A county of Luoyang, Henan, China.

Xinanname

A subdistrict of Sanshui district, Foshan, Guangdong, China.

Xinbeiname

Synonym of New Taipei.

Xinbinname

A Manchu autonomous county in Fushun, Liaoning, China.

Xincanoun

A non-Mayan indigenous people of Mesoamerica with communities in the southern portion of Guatemala, near its border with El Salvador, and in the mountainous region to the north.

Xincainame

A county of Zhumadian, Henan, China.

Xincanadj

Of or relating to a small family of Mesoamerican languages, now nearly extinct, once spoken by the indigenous Xinca people in southeastern Guatemala, much of El Salvador, and parts of Honduras.

xinesinoun

High priest of the Hasinai confederacy.

Xinfuname

A district of Xinzhou, Shanxi, China.

xingsnoun

plural of xing

Xinguname

A major river in Brazil that flows north into the Amazon delta.

Xingyename

A county of Yulin, Guangxi autonomous region, China.

Xingyiname

A county-level city of Qianxinan, Guizhou, China.

Xinhuaname

A district of Shijiazhuang, Hebei, China.

Xinhuiname

A district of Jiangmen, Guangdong, China; a former county of Guangdong, China.

Xiningname

A city in northwestern China, capital of Qinghai Province.

Xinisname

A surname from Greek.

Xinminame

A county-level city of Zhengzhou, Henan, China.

Xinpuname

An urban township in Hsinchu County, Taiwan.

Xinqiuname

A district of Fuxin, Liaoning, China.

Xinshiname

A town in Jingshan, Jingmen, Hubei, China.

Xinwuname

A district of Taoyuan, Taiwan.

Xinyename

A county of Nanyang, Henan, China.

Xinyiname

A district of Taipei, Taiwan.

Xinyuname

A prefecture-level city of Jiangxi, China.

Xinzhuname

A subdistrict of Qingxiu district, Nanning, Guangxi autonomous region, China.

xiongadj

Alternative form of siong.

Xiongsname

plural of Xiong

Xipayaname

A moribund Tupian language of the Pará region of Brazil.

xiphenoun

plural of xiphos

xipho-prefix

sword; sword-shaped

xiphoinoun

plural of xiphos

xiphosnoun

A double-edged, single-handed sword, typically used by Ancient Greek hoplites as a secondary weapon after the dory (thrusting spear) or javelin.

Xipingname

A county of Zhumadian, Henan, China.

xiqinnoun

An ancient Chinese vertical bowed string instrument with two strings.

Xiqingname

A district of Tianjin, China.

Xishaname

Synonym of Paracel Islands: the Mandarin Chinese-derived name.

Xishuiname

A county of Huanggang, Hubei, China.

Xitlername

Xi Jinping (Chinese leader).

Xitswaname

Synonym of Tswa (“a Bantu language”).

xittedverb

simple past and past participle of xit

xiucainoun

In ancient China, a scholar who has passed the entry-level examination to study at a college.

Xiuwenname

A county of Guiyang, Guizhou, China.

Xiuwuname

A county of Jiaozuo, Henan, China.

Xiuyuname

A district of Putian, Fujian, China.

XIVthadj

Abbreviation of fourteenth; 14th.

Xixianame

A county of Nanyang, Henan, China.

Xiximenoun

A member of an indigenous people once living in Sinaloa, Mexico.

Xixiuname

A district of Anshun, Guizhou, China.

Xiyangname

A county of Jinzhong, Shanxi, China.

Xiyinname

An island of Dongyin, Lienchiang County, Taiwan, in the Matsu Islands.

Xizangname

Tibet Autonomous Region of the People’s Republic of China.

Xizhiname

A district of New Taipei City, Taiwan.

Xletsnoun

plural of Xlet

XLinkname

XML markup language specified by W3C that provides methods for creating internal and external links within XML documents, and associating metadata with those links.

Xmasedverb

simple past and past participle of Xmas

Xmasesname

plural of Xmas

Xmassyadj

Abbreviation of Christmassy.

xmitsverb

third-person singular simple present indicative of xmit

xMOOCnoun

A MOOC (massive open online course) structured like a traditional course, with a clear syllabus of recorded lectures and self-test problems.

xMOOCsnoun

plural of xMOOC

XNANDnoun

XOR, a logic gate

xnipecnoun

A fiery salsa made with onions, habaneros, and orange juice.

xnipeknoun

Alternative form of xnipec.

Xnty.name

Abbreviation of Christianity.

xoananoun

plural of xoanon

xoanonnoun

A wooden statue used as a cult image in Ancient Greece.

XOFFsnoun

plural of XOFF

Xolosnoun

plural of Xolo

Xomananame

Alternative form of Yumana (“Arawakan language”).

xoomiinoun

Alternative form of khoomei (a style of throat singing).

xoomijnoun

Alternative form of khoomei (a style of throat singing).

XORedverb

simple past and past participle of XOR

XORingverb

present participle and gerund of XOR

xornsnoun

plural of xorn

Xosasnoun

plural of Xosa

xoxoxointj

An abbreviation for hugs and kisses, usually placed at the end of a letter.

XP-53name

The original designation of the Curtiss P-60.

XP-53sname

plural of XP-53

XP-90name

The original designation of the Lockheed XF-90, redesignated in 1948.

XP-90sname

plural of XP-90

XPathname

Abbreviation of XML Path Language.

XPCOMname

Abbreviation of Cross-Platform Component Object Model.

XPersnoun

plural of XPer

xpostnoun

Abbreviation of crosspost.

xpostsverb

third-person singular simple present indicative of xpost

XQueryname

A query language designed to query collections of XML data

Xquicname

A mythological figure from the 16th-century Popol Vuh, the mother of the Maya Hero Twins.

XR9576noun

Tariquidar.

Xraysnoun

plural of Xray

XSRFsnoun

plural of XSRF

Xstmasnoun

Archaic form of Xmas.

xtalsnoun

plural of xtal

Xtianadj

Abbreviation of Christian.

Xtiansnoun

plural of Xtian

Xtinaname

Abbreviation of Christina.

Xtmasnoun

Archaic form of Xmas.

Xuanwuname

Synonym of Black Turtle.

Xubanname

An ancient Aquitanian deity.

Xuejianame

Alternative form of Syuejia.

Xuerebname

A surname.

Xuetanoun

One of a strictly endogamous social group on the island of Mallorca, descendants of Mallorcan Jews who either converted to Christianity or were forced to keep their religion hidden.

Xuetesnoun

plural of Xueta

Xuhuiname

A district of Shanghai, China.

xuixonoun

A viennoiserie pastry filled with crema catalana, from Girona in Catalonia, Spain.

xuixosnoun

plural of xuixo

Xunhuaname

A Salar autonomous county in Haidong, Qinghai, China.

Xunyiname

A county of Xianyang, Shaanxi, China.

Xuthusname

A son of Hellen and Orseis, and founder (through his sons) of the Achaean and Ionian nations.

xutulinoun

An Indian vessel flute made from clay or bamboo used in the Rongali Bihu festival.

xuxosnoun

plural of xuxo

Xuzhouname

A prefecture-level city in northwestern Jiangsu, China.

xvaluenoun

A value representing an object near the end of its lifetime whose resources can be reused, typically by moving them.

xvideoname

Alternative form of XVideo (“the X video extension”).

xvidsnoun

plural of xvid

xwalknoun

Abbreviation of crosswalk.

xwalksnoun

plural of xwalk

xwindnoun

Abbreviation of crosswind.

xwindsnoun

plural of xwind

xwordnoun

Alternative form of x-word (“crossword”).

xwordsnoun

plural of xword

XXXedverb

simple past and past participle of XXX

XXXesverb

third-person singular simple present indicative of XXX

XXXingverb

present participle and gerund of XXX

XXXXLnoun

Initialism of extra extra extra extra large (the manufactured size or an item of that size).

xyelidnoun

Any in the family Xyelidae of sawflies.

xylannoun

A polysaccharide, consisting of xylose residues, found in the cell walls of some algae and plants.

xylansnoun

plural of xylan

xylaryadj

Of or relating to wood and especially xylem

xylatenoun

Any salt or ester of xylic acid.

xylemsnoun

plural of xylem

xylenenoun

Any of a group of three isomeric aromatic hydrocarbons, found in coal and wood tar.

xylicadj

Pertaining to xylene.

xylitenoun

A liquid hydrocarbon found in crude wood spirits.

xylo-prefix

wood

xyloidadj

Characteristic of wood; woody

xylolnoun

Xylene.

xylolsnoun

plural of xylol

xylomanoun

A tumour on the woody part of a plant.

xylonnoun

A unit of length in Ancient Greece.

xylosnoun

plural of xylo

xylosenoun

One of the pentoses, C₅H₁₀O₅, a white crystalline sugar, derived from wood.

xyloylnoun

A radical, (CH₃)₂.C₆H₃, derived from xylic acid, used in cosmetics and perfumes.

xylylnoun

Any of several univalent radicals, of formula (CH₃)₂C₆H₃- derived from the three isomers of xylene: ortho-, meta- and para- (di-methyl benzene).

xylylsnoun

plural of xylyl

xyphusnoun

A triangular part of the prosternum that is found between the bases of the anterior coxae.

xyridnoun

Any of several North American plants, of the genus Xyris, resembling sedges.

xyridsnoun

plural of xyrid

xyrisnoun

Any member of the plant genus Xyris.

xyro-prefix

Alternative form of xyr-.

xysmanoun

Material resembling bits of membrane in stools of diarrhea.

xystanoun

plural of xyston

xysternoun

A surgical instrument used to scrape bones.

xystinoun

plural of xystus

xystoinoun

plural of xystos

xystonnoun

A type of long thrusting lance, used in ancient Greece.

xystosnoun

Alternative form of xystus.

xystsnoun

plural of xyst

xystumnoun

A xystus.

xystusnoun

A long and open portico within the gymnasium.

xyzzynoun

Used as a placeholder word or metasyntactic variable.

Xöömijnoun

Alternative form of khoomei (a style of throat singing).