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Search by letter: A
- Arrondissements of the Hautes-Alpes department
- Arrondissements of the Hautes-Pyrénées department
- Arrondissements of the Hérault department
- Arrondissements of the Indre department
- Arrondissements of the Indre‑et‑Loire department Arrondissements of the Indre-et-Loire department
- Arrondissements of the Isère department (France) Arrondissements of the Isère department
- Arrondissements of the Jura department
- Arrondissements of the Landes department
- Arrondissements of the Loir-et-Cher department
- Arrondissements of the Loire department
- Arrondissements of the Loiret department
- Arrondissements of the Lot department
- Arrondissements of the Lot‑et‑Garonne department Arrondissements of the Lot-et-Garonne department
- Arrondissements of the Lozère department
- Arrondissements of the Marne department
- Arrondissements of the Meurthe-et-Moselle department
- Arrondissements of the Moselle department
- Arrondissements of the Nièvre department
- Arrondissements of the Nord department
- Arrondissements of Puy-de-Dôme, France: administrative districts and subprefectures Arrondissements of the Puy-de-Dôme department
- Arrondissements of the Pyrénées-Atlantiques department
- Arrondissements of the Pyrénées-Orientales department
- Arrondissements of the Saône-et-Loire department
- Arrondissements of the Savoie department
- Arrondissements of the Tarn department
- Arrondissements of the Tarn-et-Garonne department
- Arrondissements of the Var department
- Arrondissements of the Vaucluse department
- Arrondissements of the Vienne department
- Arrondissements of the Yonne department
- Arronnes — a commune in Allier, central France Arronnes
- Arros (river)
- Arros-de-Nay: a commune in Pyrénées-Atlantiques, France Arros-de-Nay
- Arrosès — commune in Pyrénées-Atlantiques, southwestern France Arrosès
- Arroux — river of central France Arroux
- Arrow (projectile used with a bow) Arrow
- Arrowhead
- Arrowhead Stadium
- Arrows Grand Prix International (Formula One team) Arrows
- Arrowsmith — maker of arrowheads and traditional projectile points Arrowsmith
- Arrowsmith, Illinois: village profile and local overview Arrowsmith, Illinois
- Arroyo Barril, Samaná — coastal municipal district of the Dominican Republic Arroyo Barril
- Arroyo Grande, California: Central Coast city overview Arroyo Grande, California
- Arroyo Seco — stream and watershed in Los Angeles County Arroyo Seco
- Arry, Somme: a small commune in Hauts-de-France, northern France Arry, Somme
- Ars-sur-Formans — commune and pilgrimage site in Ain, France Ars-sur-Formans
- Arsac, Gironde — commune in southwestern France Arsac
- Arsacid (Arshakuni) Dynasty of Armenia Arsacid Dynasty of Armenia
- Arsanjan: city and administrative center in Fars Province, Iran Arsanjan
- Arsanjan County, Fars Province, Iran Arsanjan County
- Arsen Yegiazarian — Armenian chess grandmaster and trainer (1970–2020) Arsen Yegiazarian
- Arsenal (armory, sites, and cultural uses) Arsenal
- Arsenal de Sarandí
- Arsenal F.C.: History, identity, achievements and significance Arsenal F.C.
- Arsenal Football Club Arsenal F.C.
- Arsenal tube station (London Underground) Arsenal tube station
- Arsenate (AsO4 3−): chemistry, biology, and environmental significance Arsenate
- Arsène Lupin: the Gentleman Thief and Cultural Icon Arsène Lupin
- Arsène Tchakarian: French‑Armenian Resistance member and historian Arsène Tchakarian
- Arsène Wenger — French Football Manager (Arsenal 1996–2018) Arsène Wenger
- Arsenic
- Arsenic acid (H3AsO4) Arsenic acid
- Arsenic and Old Lace (play and 1944 film) Arsenic and Old Lace
- Arsenic pentafluoride (AsF5) Arsenic pentafluoride
- Arsenic pentoxide (As2O5) Arsenic pentoxide
- Arsenic Sulfides — Minerals, Chemical Properties, Uses and Environmental Risks Arsenic sulfide
- Arsenic tribromide (AsBr3): properties, preparation and safety Arsenic tribromide
- Arsenic trichloride (arsenic(III) chloride) Arsenic trichloride
- Arsenic trifluoride (arsenic(III) fluoride) Arsenic trifluoride
- Arsenic triiodide (AsI3): properties, preparation, and precautions Arsenic triiodide
- Arsenic trioxide (As2O3): properties, uses, history and safety Arsenic trioxide
- Arsenic trisulfide (orpiment) Arsenic trisulfide
- Arsenide (As3−): chemistry, properties, reactions and uses Arsenide
- Arsenio Hall: Comedian, Actor and Late-Night Television Host Arsenio Hall
- Arsenite: chemical forms, properties, toxicity and environmental role Arsenite
- Arseniy Yatsenyuk
- Arsenous acid (arsenious acid) — properties, occurrence, and significance Arsenous acid
- Arseny Mironov (1917–2019) — Russian aerospace engineer and flight test pioneer Arseny Mironov
- Arseny Roginsky — Soviet dissident, historian and Memorial leader Arseny Roginsky
- Arshile Gorky: Armenian‑born American painter and precursor of Abstract Expressionism Arshile Gorky
- Arsine (AsH3): properties, production, history, uses and hazards Arsine
- Arson (deliberate fire-setting) Arson
- Arsonval (commune in Aube, France) Arsonval
- Art: Forms, Purpose, History, and Cultural Significance Art
- Art & Language: a collaborative nucleus of conceptual art Art & Language
- Art Bell
- Art Blakey (1919–1990): Influential Jazz Drummer and Bandleader Art Blakey
- Art Buchwald — American humorist and political satirist Art Buchwald
- Art Carney: Ed Norton, character actor and Academy Award winner Art Carney
- Art Clokey — Pioneer of Clay Animation and Creator of Gumby Art Clokey
- Art critic: roles, methods, history, and influence Art critic
- Art Deco: Origins, Style, and Influence Art Deco
- Art Eggleton: Canadian mayor, cabinet minister, and senator Art Eggleton
- Art exhibition: purpose, forms, and how exhibitions are organized Art exhibition
- Art film — arthouse, independent and auteur-driven cinema Art film
- Art Fleming
- Art Garfunkel
- Art history: study, methods, development and significance Art history
- Art Institute of Chicago art museum in Grant Park
- Art Linkletter: Canadian-born American broadcaster, host of House Party and People Are Funny Art Linkletter
- Art Modell: NFL Owner Known for the Browns-to-Ravens Relocation Art Modell
- Art movement (art 'ism'): definition, history, characteristics, and significance Art movement
- Art museum: purpose, collections, history and functions Art museum
- Art music: serious, classical, and modern musical traditions Art music
- Art Neville (1937–2019): New Orleans keyboardist, songwriter and funk pioneer Art Neville
- Art Nouveau: origins, characteristics, and global influence Art Nouveau
- Art of East Asia
- Art of Life (X Japan composition and album) Art of Life
- Art Paul (Arthur Paul) – American graphic designer and founding art director of Playboy Art Paul
- Art Pepper — American Alto Saxophonist Art Pepper
- Art rock: an overview of the experimental side of rock music Art rock
- Art Ross: player, coach, inventor and early NHL executive Art Ross
- Art Ross Trophy given to the top scoring player each year in the National Hockey League
- Art Shay: American Photographer and Chronicler of 20th-Century Life Art Shay
- Arta, Greece Arta
- Arta Prefecture — geography, history, economy and cultural heritage Arta Prefecture
- Arta Region of Djibouti Arta Region
- Artabanus IV (Parthian king, reign c.216–224) Artabanus IV
- Artashat (Artaxata), Armenia Artashat, Armenia
- Artavazd Peleshyan: Armenian Documentary Filmmaker and Film Theorist Artavazd Peleshyan
- Artaxiad dynasty of Iberia (ancient Georgia) Artaxiad dynasty of Iberia
- Arte Johnson: Career and Legacy of the Laugh-In Comic Arte Johnson
- Artem Ivanovich Mikoyan: Soviet Aircraft Designer and MiG Co‑founder Artem Mikoyan
- Artem Milevskiy
- Artemare — commune in the Ain department of Auvergne‑Rhône‑Alpes Artemare
- Artemi Panarin: Russian NHL Winger and Playmaker Artemi Panarin
- Artemio Franchi — Italian football administrator and UEFA president Artemio Franchi
- Artemio V. Panganiban: 21st Chief Justice of the Supreme Court of the Philippines Artemio Panganiban
- Artemis: Greek goddess of the hunt, moon, childbirth and chastity Artemis
- Artemis 1: Uncrewed Test Flight of SLS and Orion Artemis 1
- Artemis Fowl (book series) Artemis Fowl
- Artemis Fowl (novel)
- Artemis program — NASA-led return to the Moon Artemis program
- Artemisa Province
- Artemisia (genus of flowering plants) Artemisia (genus)
- Artemisia absinthium (wormwood): description, history and uses Artemisia absinthium
- Artemisia annua (sweet wormwood): description, uses, and significance Artemisia annua
- Artemisia Gentileschi
- Artemision Zeus (Early Classical Greek Bronze, c. 460 BCE) Artemision Zeus
- Artemps: small commune in northern France Artemps
- Artenay (Loiret) Artenay
- Arteriosclerosis: types, symptoms, causes, diagnosis and prevention Arteriosclerosis
- Arteriovenous malformation (AVM): overview, symptoms, diagnosis and treatment Arteriovenous malformation
- Artery: structure, function, and clinical importance Artery
- Artesian Aquifer: Confined Groundwater Under Natural Pressure Artesian aquifer
- Arth — municipality in the canton of Schwyz, Switzerland Arth
- Arthashastra: Ancient Indian Treatise on Statecraft and Economics Arthashastra
- Arthez-d'Asson
- Arthez-de-Béarn
- Arthezé — commune in Sarthe, Pays de la Loire Arthezé
- Arthit Kamlang-ek
- Arthonnay — commune in Yonne, Bourgogne-Franche-Comté, France Arthonnay
- Arthritis: causes, types, symptoms and management Arthritis
- Arthrodires (Arthrodira) — jointed-neck placoderm fishes of the Devonian Arthrodire
- Arthroleptidae (squeaker frogs of sub-Saharan Africa) Arthroleptidae
- Arthropod: characteristics, diversity, evolution and ecological importance Arthropod
- Arthur — name, origins, and cultural significance Arthur
- Arthur (1981 film) Arthur (1981 movie)
- Arthur (book series)
- Arthur — Season 1 (1996) Arthur (season 1)
- Arthur (season 2)
- Arthur (season 23)
- Arthur — Season 3 (1998–1999) Arthur (season 3)
- Arthur (TV series)
- Arthur A. Lumsdaine: Pioneer in Media, Programmed Learning and Training Evaluation Arthur A. Lumsdaine
- Arthur Abraham
- Arthur Anderson (1922–2016): American actor and voice artist Arthur Anderson
- Arthur Ashe — Tennis champion, activist, and humanitarian Arthur Ashe
- Arthur Ashkin: inventor of optical tweezers and Nobel Prize-winning physicist Arthur Ashkin
- Arthur B. McDonald — Canadian physicist and Nobel laureate Arthur B. McDonald
- Arthur Balfour, 1st Earl of Balfour (1848–1930) Arthur Balfour
- Arthur Barnard (1929–2018) — American 110 m hurdler and 1952 Olympic bronze medalist Arthur Barnard
- Arthur Beetson – Australian rugby league player, captain and coach Arthur Beetson
- Arthur Bisguier — American Chess Grandmaster, Promoter, and Writer Arthur Bisguier
- Arthur Bliss (1891–1975) — British composer and Master of the Queen's Music Arthur Bliss
- Arthur Blythe — American Jazz Alto Saxophonist and Composer Arthur Blythe
- Arthur Bunting: English rugby league halfback and influential coach Arthur Bunting
- Arthur C. Clarke: Writer, Futurist and Advocate for Space Arthur C. Clarke
- Arthur C. Clarke Award
- Arthur Christmas
- Arthur Conan Doyle
- Arthur County, Nebraska
- Arthur "Big Boy" Crudup Arthur Crudup
- Arthur Darvill
- Arthur Davidson — co‑founder of Harley‑Davidson and early motorcycle entrepreneur Arthur Davidson
- Arthur Davies (Welsh tenor) — career and legacy Arthur Davies (tenor)
- Arthur de Gobineau
- Arthur Dion "A.D." Hanna Arthur Dion Hanna
- Arthur Dove: Pioneer of American Abstract Painting Arthur Dove
- Arthur Drewry — English football administrator and fifth FIFA president Arthur Drewry
- Arthur E. Chase — Massachusetts businessman, state senator, and education advocate Arthur E. Chase
- Arthur Eddington: astronomer, astrophysicist and interpreter of relativity Arthur Eddington
- Arthur Fadden: Australian politician and brief-serving prime minister Arthur Fadden
- Arthur Foulkes — Bahamian politician and former Governor‑General Arthur Foulkes
- Arthur Friedenreich: Pioneer of Brazilian Football Arthur Friedenreich
- Arthur Fry — Co‑creator of the Post‑it Note Arthur Fry
- Arthur Gardner: American actor and film/television producer Arthur Gardner
- Arthur Gelb
- Arthur J. Goldberg Arthur Goldberg
- Arthur Griffith: Irish statesman, Sinn Féin founder and treaty negotiator Arthur Griffith
- Arthur Grumiaux: Belgian violinist and pianist (1921–1986) Arthur Grumiaux
- Arthur H. Rosenfeld: pioneer of energy efficiency and public service Arthur H. Rosenfeld
- Arthur H. Vandenberg
- Arthur Hiller (1923–2016) — Canadian film and television director Arthur Hiller
- Arthur Holmes: Pioneer of Radiometric Dating and Mantle Convection Arthur Holmes
- Arthur Honegger
- Arthur J. Jackson (1924–2017), U.S. Marine and Medal of Honor recipient Arthur J. Jackson
- Arthur Janov and the Development of Primal Therapy Arthur Janov
- Arthur Kornberg (1918–2007): Discoverer of DNA Synthesis Mechanisms Arthur Kornberg
- Arthur Laurents — American playwright, stage director, and screenwriter Arthur Laurents
- Arthur L. Schawlow: co‑inventor of the laser and pioneer of laser spectroscopy Arthur Leonard Schawlow
- Arthur Liebehenschel — SS Officer at Auschwitz and Majdanek Arthur Liebehenschel
- Arthur Lowe — English actor best known as Captain Mainwaring Arthur Lowe
- Arthur Machado — Brazilian footballer (1909–1997) Arthur Machado
- Arthur Marks
- Arthur Meighen: Canadian lawyer, Conservative leader, and two-time prime minister Arthur Meighen
- Arthur Miller
- Arthur Mitchell — American dancer, choreographer, and founder of Dance Theatre of Harlem Arthur Mitchell (dancer)
- Arthur Morris — Australian Test cricketer (1922–2015) Arthur Morris
- Arthur Moulin: French deputy, senator and long-serving mayor (1924–2017) Arthur Moulin
- Arthur Murray
- Arthur Mutambara
- Arthur Nikisch — Hungarian conductor and early recording pioneer Arthur Nikisch
- Arthur O'Connell
- Arthur of the Britons (1972–73) — British television drama about post‑Roman Arthur Arthur of the Britons
- Arthur Penn: American film and television director (1922–2010) Arthur Penn
- Arthur Phillip — First Governor of New South Wales Arthur Phillip
- Arthur Polonsky: American Painter, Draughtsman, and Educator Arthur Polonsky
- Arthur Rackham: British Illustrator of Myth, Fairy Tale and Fantasy Arthur Rackham
- Arthur Ransome: author of the Swallows and Amazons adventures Arthur Ransome
- Arthur Ravenel Jr. Bridge
- Arthur Read
- Arthur Rimbaud
- Arthur Rubinstein
- Arthur Ryan (1935–2019) — Founder of Primark (Penneys) Arthur Ryan
- Arthur S. Obermayer: American Entrepreneur and Philanthropist Arthur S. Obermayer
- Arthur Saint-Léon (1821–1870): French dancer and choreographer Arthur Saint-Léon
- Arthur L. Samuel: pioneer of machine learning and early computer game AI Arthur Samuel
- Arthur Schlesinger Jr.: Historian, Presidential Adviser, and Liberal Critic Arthur Schlesinger Jr
- Arthur Schopenhauer: life, philosophy and influence Arthur Schopenhauer
- Arthur Seyß-Inquart: Austrian jurist and Nazi official Arthur Seyß-Inquart
- Arthur Smith (footballer, born 1915)
- Arthur Sullivan: Composer of Comic Opera and Sacred Music Arthur Sullivan
- Arthur Summons — Australian dual-code rugby international and captain Arthur Summons
- Arthur Valerian Wellesley, 8th Duke of Wellington
- Arthur Waley — English orientalist, translator and popularizer of East Asian literature Arthur Waley
- Arthur Wellesley, 1st Duke of Wellington — soldier and statesman Arthur Wellesley, 1st Duke of Wellington
- Arthur, Illinois
- Arthur, Iowa
- Arthur, Nebraska: small village and county seat in the Sandhills Arthur, Nebraska
- Arthur, Prince of Wales: Tudor Heir and the Marriage That Shaped a Dynasty Arthur, Prince of Wales
- Arthur's Big Hit
- Arthur's Missing Pal
- Arthur's Nose
- Artibonite (department)
- Artibonite River (Hispaniola) Artibonite River
- Artichoke (Cynara scolymus): description, cultivation, culinary uses, and history Artichoke
- Article (word and concept) Article
- Article (grammar): definite and indefinite markers Article (grammar)
- Article Five of the United States Constitution outlines how the Constitution can be changed
- Article Four of the United States Constitution: States, Territories, and Federal Guarantees Article Four of the United States Constitution
- Article One of the United States Constitution establishes the legislative branch of the federal government
- Article Seven of the United States Constitution
- Article Six of the United States Constitution
- Article Three of the United States Constitution It creates the Supreme Court
- Article Two of the United States Constitution: The Executive Branch Article Two of the United States Constitution
- Articles of Confederation: America's First Constitution and Its Legacy Articles of Confederation
- Articulated vehicle
- Artie Shaw — American Clarinetist, Bandleader and Composer Artie Shaw
- Artifact (man-made object and related meanings) Artifact
- Artifact (cultural object) Artifact (culture)
- Artificial: Meaning, Origins, Types, and Practical Uses Artificial
- Artificial cranial deformation
- Artificial fly (fishing lure) Artificial fly
- Artificial insemination
- Artificial intelligence: overview, history, methods, applications and types Artificial intelligence
- Artificial Intelligence (John Cale album) Artificial Intelligence (album)
- Artificial island (man-made island) Artificial island
- Artificial language
- Artificial leather
- Artificial life (Alife): study of life-like systems and emergent behavior Artificial life
- Artificial neural network (ANN) Artificial neural network
- Artificial pacemaker (cardiac pacemaker) Artificial pacemaker
- Artificial selection: intentional breeding of plants and animals Artificial selection
- Artificial sweetener (sugar substitute) Artificial sweetener
- Artificial turf (synthetic grass) Artificial turf
- Artigas Department, Uruguay Artigas Department
- Artigueloutan
- Artiguelouve — Commune in Pyrénées-Atlantiques, southwestern France Artiguelouve
- Artigues-près-Bordeaux
- Artigues (Aude): small commune in Occitanie, southern France Artigues, Aude
- Artillery: definition, types, history and battlefield roles Artillery
- Artillery (Danish thrash metal band) Artillery (band)
- Artillery of Japan
- Artiodactyls — even-toed ungulates Artiodactyl
- Artisan
- Artist: creators, forms, history, and societal roles Artist
- Artivism: the intersection of art and social activism Artivism
- Artix (Pyrénées-Atlantiques): Overview, history, and local features Artix, Pyrénées-Atlantiques
- Arto Paasilinna — Finnish novelist known for comic, satirical fiction Arto Paasilinna