Search by letter: A
Search by letter
Search by letter: A
- Abraham Ortelius: Flemish cartographer and compiler of the first modern atlas Abraham Ortelius
- Abraham Palatnik: Brazilian Pioneer of Kinechromatic and Kinetic Art Abraham Palatnik
- Araken Patusca (Abraham Patusca da Silveira) Abraham Patusca da Silveira
- Abraham Quintanilla Jr. Abraham Quintanilla
- Abraham 'Grampa' Simpson — character profile Abraham Simpson
- Abraham Washington (Brian Jossie) — WWE ring persona and talk-show host Abraham Washington
- Abrahamic religions: origins, beliefs, and traditions Abrahamic religions
- Abraham's Well International Visitors Center, Beersheba Abrahams Well International Visitors Center
- Abram
- Abram Games — British graphic designer (1914–1996) Abram Games
- Abrams, Wisconsin (town in Oconto County) Abrams, Wisconsin
- Abrasion (medical)
- Abrasive: materials, forms, uses, and selection Abrasive
- Abrest: French commune in the Allier department Abrest
- Abrictosaurus — Early Jurassic heterodontosaurid from southern Africa Abrictosaurus
- Abruzzo: geography, culture, history and highlights of the Italian region Abruzzo
- ABS-CBN — Philippine broadcaster: history, operations, and influence ABS-CBN
- ABS-CBN Corporation
- Abscess (medical condition): causes, symptoms, diagnosis, and treatment Abscess
- Absecon, New Jersey — coastal city in Atlantic County Absecon, New Jersey
- Absh Khatun: 13th‑century Ruler of Shiraz and the Atabeg Line Absh Khatun
- Absheron District (Azerbaijan) Absheron District
- Absheron Economic Region — Azerbaijan's eastern industrial and energy hub Absheron Economic Region
- Absinthe: origins, composition, culture, bans, and modern revival Absinthe
- Absinthe spoon: design, use, history and ritual Absinthe spoon
- Absolute monarchy: definition, features, history and modern relevance Absolute monarchy
- Absolute Space and Time: Historical Concept and Role in Physics Absolute space and time
- Absolute temperature (thermodynamic temperature) Absolute temperature
- Absolute threshold of hearing
- Absolute truth (philosophical concept) Absolute truth
- Absolute value (modulus) of a number Absolute value
- Absolute zero: concept, physical meaning, experiments and practical effects Absolute zero
- Absolution: Christian rite of forgiveness, forms and history Absolution
- Absolution (Muse album) Absolution (album)
- Abson: small hamlet in South Gloucestershire with a historic church and literary link Abson
- Absorption (physical and chemical processes) Absorption
- Absorption spectroscopy: principles, instruments, and applications Absorption spectroscopy
- Abstatt, Baden-Württemberg Abstatt
- Abstinence: Voluntary restraint from pleasurable activities Abstinence
- Abstraction: definition, types, and practical uses Abstract
- Abstract algebra: structures, concepts, history and applications Abstract algebra
- Abstraction: definition, types, history, and practical uses Abstraction
- Absurdism: philosophy of the human search for meaning Absurdism
- Abswurmbachite
- Abtwil
- Abtwil (Muri), Aargau — Swiss municipality overview Abtwil, Aargau
- Abu Ali al-Anbari — senior Islamic State commander and Syria governor Abu Ali al-Anbari
- Abu Anas al-Libi (Nazih al-Ruqai'i) — Libyan al-Qaeda operative Abu Anas al-Libi
- Abu Bakr (c. 573–634) — First Caliph and Early Muslim Leader Abu Bakr
- Abu Bakr al‑Baghdadi Abu Bakr al-Baghdadi
- Abu Dawud: 9th‑Century Hadith Scholar and Compiler of Sunan Abu Dawud Abu Dawud
- Abu Dhabi: Capital City and Leading Emirate of the United Arab Emirates Abu Dhabi
- Abu Dhabi (emirate)
- Abu Dhabi Authority for Culture & Heritage (ADACH): role, history, and collections Abu Dhabi Authority for Culture & Heritage
- Abu Dhabi Grand Prix
- Abu Dhabi United Group for Development and Investment Abu Dhabi United Group
- Abu Ghraib prison (Iraq) Abu Ghraib prison
- Abu Hurairah — Companion of Muhammad and Hadith Transmitter Abu Hurairah
- Abu Kabir Forensic Institute (L. Greenberg National Institute of Forensic Medicine) Abu Kabir Forensic Institute
- Abu Mahdi al‑Muhandis Abu Mahdi al-Muhandis
- Abu Musab al-Zarqawi (1966–2006) Abu Musab al-Zarqawi
- Abu Nidal (Sabri Khalil al‑Banna) and the Abu Nidal Organization Abu Nidal
- Abu Nuwas: Leading Poet of the Early Abbasid Era Abu Nuwas
- Abu Omar al-Shishani (Tarkhan Batirashvili): Georgian-born Islamic State commander Abu Omar al-Shishani
- Abu Simbel temples: rock-cut monuments of Ramesses II Abu Simbel temples
- Abu Talib ibn ʿAbd al‑Muṭṭalib (c. 539–c. 619) Abu Talib
- Abu Al-Asar Hafeez Jullundhri Abu-Al-Asar Hafeez Jullundhri
- Abubakar Shekau: Leader of Boko Haram Abubakar Shekau
- Abubakari Yakubu
- Abugida (alphasyllabary) Abugida
- Abuja — Capital city of Nigeria Abuja
- Abukuma River (Abukuma-gawa) Abukuma River
- Abul Khayr Alonto — Filipino lawyer, businessman and MinDA chairman Abul Khayr Alonto
- AbulÉdu: French Debian-based Linux distribution for classrooms AbulÉdu
- Abulfaz Elchibey: Azerbaijani leader and president (1938–2000) Abulfaz Elchibey
- Abundant number
- Abuse: Types, Causes, Effects, and Responses Abuse
- Abuse of power
- Abutment (bridge and dam support) Abutment
- Åby
- Åby: locality in Norrköping Municipality, Östergötland, Sweden Åby, Norrköping Municipality
- Åby, Växjö Municipality (Kronoberg County) Åby, Växjö Municipality
- Abydos King List list of 76 kings of Ancient Egypt
- Abyss (wrestler)
- Abzac (Gironde) — commune in Nouvelle-Aquitaine, France Abzac, Gironde
- AC Ajaccio (Athletic Club Ajaccio) AC Ajaccio
- AC Cobra: British roadster with American V‑8 — history, design, variants and legacy AC Cobra
- AC Mogadiscio — Italian community football club in Mogadishu AC Mogadiscio
- AC Omonia Nicosia AC Omonia
- AC Sparta Prague — leading Czech football club AC Sparta Prague
- Acacia — genus of shrubs and trees in the legume family Acacia
- Acacia baileyana (Cootamundra wattle): description, origin, uses and impacts Acacia baileyana
- Acácio Cordeiro Barreto
- Academia: institutions, roles, history, and contemporary issues Academia
- Academia Europaea: Pan‑European Academy of Humanities, Law and Sciences Academia Europaea
- Academic art: principles, institutions, and decline Academic art
- Academic degree: purpose, types, and international practices Academic degree
- Academic Festival Overture, Op. 80 Academic Festival Overture
- Academic journal
- Academic Ranking of World Universities (ARWU) — Shanghai Ranking Academic Ranking of World Universities
- Académie de l'air et de l'espace (AAE) — French air and space academy Académie de l'air et de l'espace
- Académie des Beaux-Arts
- Académie française
- Academy: institution of learning, research and honor Academy
- Academy Awards (Oscars) Academy Award
- Academy Award for Animated Short Film
- Academy Award for Best Actor one of the Academy Awards of Merit
- Academy Award for Best Actress
- Academy Award for Best Animated Feature
- Academy Award for Best Assistant Director
- Academy Award for Best Cinematography
- Academy Award for Best Costume Design one of the Academy Awards of Merit
- Academy Award for Best Dance Direction
- Oscar for Best Directing: criteria, history, and impact on filmmakers Academy Award for Best Director
- Academy Award for Best Documentary (Short Subject)
- Academy Award for Best Documentary Feature
- Academy Award for Best Film Editing
- Academy Award for Best Makeup and Hairstyling
- Academy Award for Best Original Score
- Academy Award for Best Original Song
- Academy Award for Best Picture
- Academy Award for Best Picture
- Academy Award for Best Picture
- Academy Award for Best Picture
- Academy Award for Best Picture
- Academy Award for Best Picture Oscars
- Academy Award for Best Picture
- Academy Award for Best Picture
- Academy Award for Best Picture
- Academy Award for Best Picture Oscars
- Academy Award for Best Production Design
- Academy Award for Best Supporting Actor
- Academy Award for Best Supporting Actress is one of the Academy Awards of Merit
- Academy of Motion Picture Arts and Sciences
- Academy of Sciences and Arts of Bosnia and Herzegovina (ANUBiH) Academy of Sciences and Arts of Bosnia and Herzegovina
- Academy of the Hebrew Language
- Acadia Parish, Louisiana
- Acadie–Bathurst Titan (QMJHL ice hockey team) Acadie–Bathurst Titan
- Acaena: a genus of low-growing plants in the rose family Acaena
- Açaí palm (Euterpe): fruit, ecology, uses and cultivation Açaí palm
- Acanthaceae: the acanthus family of flowering plants Acanthaceae
- Acanthite — the low‑temperature silver sulfide mineral (Ag2S) Acanthite
- Acanthocephala — thorny‑headed (spiny‑headed) parasitic worms Acanthocephala
- Acanthodii: extinct spiny fishes and early jawed vertebrates Acanthodii
- Acantholipan: armored ankylosaurian dinosaur from Mexico Acantholipan
- Acanthomintha — thornmints of the California flora Acanthomintha
- Acanthopholis — an armored Early Cretaceous dinosaur Acanthopholis
- Acanthostega, an Early Devonian fishapod Acanthostega
- Surgeonfishes and Tangs (Acanthuridae): Reef Grazers with Blade-like Caudal Spines Acanthuridae
- Acanthuroidei
- Acapulco (Acapulco de Juárez) — Pacific port city in Guerrero, Mexico Acapulco
- Acaric — Japanese educational services provider and developer of Cloud LaTeX Acaric
- Acarina (Acari): Mites and Ticks — Biology, Diversity and Impact Acarina
- Acarology: the scientific study of mites and ticks Acarology
- Acastus — Greek mythological hero, Argonaut and king of Iolcus Acastus
- Acceleration (physics) Acceleration
- Acceleration due to gravity
- Accelerometer: sensor for measuring proper acceleration and motion Accelerometer
- Accent — regional and personal patterns of pronunciation Accent
- Accept (German heavy metal band) Accept (band)
- Access control: principles, models, technologies, and biometrics Access control
- Accessibility: ensuring equal access to environments, information and services Accessibility
- Accession — attainment of office in monarchies and republics Accession
- Accident: causes, types, consequences and prevention Accident
- Accident (1967 film) Accident (1967 movie)
- Accipitridae: overview of diurnal birds of prey Accipitridae
- Accipitriformes — the diurnal birds of prey: hawks, eagles and vultures Accipitriformes
- Accolay (Yonne) — former commune in Bourgogne-Franche-Comté Accolay, Yonne
- Accomac, Virginia
- Accomack County, Virginia
- Accommodation (lodging, adjustment, and adaptation) Accommodation
- Visual accommodation (eye) — how the lens changes focus Accommodation (eye)
- Accompaniment (music): roles, types, history and practice Accompaniment
- Accons — commune in Ardèche, France Accons
- According to Jim (American TV sitcom) According to Jim
- Accordion (musical instrument) Accordion
- Account (overview and types) Account
- Accountancy (Hong Kong Legislative Council functional constituency) Accountancy (constituency)
- Accounting: Principles, Financial Statements, History and Applications Accounting
- Accous — commune in the Pyrénées‑Atlantiques, France Accous
- Accra — Capital and Largest City of Ghana Accra
- Accretion disk
- Accrington, Lancashire Accrington
- Accrington Stanley F.C.
- Accumulated Cyclone Energy (ACE): definition, calculation, and uses Accumulated cyclone energy
- Accumulator (CPU register) Accumulator
- Accuracy and precision
- Accusative case
- Ace (playing card) Ace (card)
- Ace Attorney (Gyakuten Saiban): courtroom adventure visual novel series Ace Attorney
- Ace Bailey — Canadian NHL right winger and beneficiary of the first All-Star benefit Ace Bailey
- Ace Books
- Ace Cannon: American Tenor Saxophonist and Instrumental Hitmaker Ace Cannon
- Ace Frehley — American guitarist and founding member of Kiss Ace Frehley
- Ace Frehley (1978 album) Ace Frehley (album)
- Ace of Base — Swedish pop group Ace of Base
- Aceh: northernmost province of Sumatra with distinct history and resources Aceh
- Acephalgic migraine (silent migraine): overview, features, and care Acephalgic migraine
- Acequia, Idaho
- Acer Inc. — Taiwanese multinational computer and electronics company Acer Inc.
- Silver maple (Acer saccharinum): description, habitat, uses and cultivation Acer saccharinum
- Acetamide (organic compound and rare mineral) Acetamide
- Acetate (ethanoate): structure, properties, uses, and biological roles Acetate
- Acetic acid (ethanoic acid): properties, uses, and safety Acetic acid
- Acetobacter: aerobic bacteria that oxidize alcohol to acetic acid Acetobacter
- Acetone (propanone): properties, production, uses, and safety Acetone
- Acetone peroxide (APEX): properties, hazards, and forensic significance Acetone peroxide
- Acetonitrile (MeCN): Properties, Production, Uses, and Safety Acetonitrile
- Acetyl (ethanoyl): structure, reactivity, biological roles Acetyl
- Acetylcholine: the neurotransmitter of movement, autonomic function, and cognition Acetylcholine
- Acetylcholinesterase — enzyme that terminates cholinergic transmission Acetylcholinesterase
- Acetylene (C2H2): properties, production, uses and safety Acetylene
- Acetylide (C2^(2-)): structure, preparation, and uses Acetylide
- ACF Fiorentina — Italian football club from Florence ACF Fiorentina
- Achaea: region of the northern Peloponnese Achaea
- Achaemenid Empire (c. 550–330 BC) Achaemenid Empire
- Achern — town in Ortenau, Baden-Württemberg, Germany Achern
- Achernar (Alpha Eridani): the rapid-rotating blue star at the end of Eridanus Achernar
- Acherontia atropos — Death's‑head Hawkmoth Acherontia atropos
- Acherontia lachesis — The Asian Death's-head Hawkmoth Acherontia lachesis
- Acherontia styx — the Asian death's‑head hawkmoth Acherontia styx
- Achery (Aisne) — small commune in northern France Achery, Aisne
- Acheux-en-Amiénois (Somme commune) Acheux-en-Amiénois
- Acheux-en-Vimeu — commune in the Somme department, Hauts-de-France Acheux-en-Vimeu
- Acheville — Commune in Pas-de-Calais, northern France Acheville
- Achham District — geography, people, history and development Achham District
- Achicourt, commune in Pas-de-Calais, northern France Achicourt
- Achiet-le-Grand — commune in the Pas-de-Calais department, northern France Achiet-le-Grand
- Achiet-le-Petit — commune in Pas-de-Calais, northern France Achiet-le-Petit
- Achille Silvestrini: Italian Cardinal, Vatican Diplomat and Prefect for the Oriental Churches Achille Silvestrini
- Achille, Oklahoma
- Achillea millefolium (yarrow) Achillea millefolium
- Achilles: Greek hero of the Trojan War and enduring cultural figure Achilles
- Achillobator — a large Cretaceous dromaeosaurid from Mongolia Achillobator
- Achim Hill: German single sculler and two-time Olympic silver medalist Achim Hill
- Achim Mentzel — German musician, television presenter and actor Achim Mentzel
- Achlorhydria — absence of stomach acid: causes, effects, diagnosis, management Achlorhydria
- Acholi people: history, culture, language and contemporary life Acholi people
- Achondrite — Stony Differentiated Meteorites Achondrite
- Achondroplasia: genetic disorder causing short-limbed short stature Achondroplasia
- Achterhoek: region, landscape and culture in eastern Gelderland Achterhoek
- Achterhooks: the Low Saxon dialect of the Achterhoek Achterhooks
- Achterwehr: municipality in Rendsburg-Eckernförde, Schleswig-Holstein, Germany Achterwehr
- Achtkarspelen
- Achtung Baby
- Achy Breaky Song — parody by "Weird Al" Yankovic Achy Breaky Song
- Acid — definition, properties, examples, and uses Acid
- Acid Black Cherry — solo project by Yasu (ABC) Acid Black Cherry
- Acid rain: causes, chemistry, effects and responses Acid rain
- Acid rock: origins, sound, and cultural influence Acid rock
- Acid Survivors Foundation (Bangladesh) Acid Survivors Foundation
- Acid throwing (acid attack): overview, causes, consequences, and responses Acid throwing
- Acid–Base Reaction: Principles, Types, and Applications Acid–base reaction
- Acid2 — web browser rendering conformance test Acid2
- Acidophile: organisms that thrive in highly acidic environments Acidophile
- Acinos — a small genus of aromatic Mediterranean plants Acinos
- Ackee (Blighia sapida): tropical fruit, culinary uses and safety Ackee
- Acker Bilk: English clarinettist known for 'Stranger on the Shore' Acker Bilk
- Ackerly, Texas
- Ackley, Iowa — city profile Ackley, Iowa
- Ackley, Wisconsin — small rural town in Langlade County Ackley, Wisconsin
- Acklins and Crooked Islands
- Ackworth, Iowa
- Aclens (Vaud, Switzerland) Aclens
- Acne: causes, types, treatment, and prevention Acne
- Acoelomorpha
- Aconcagua: Highest Peak in the Americas Aconcagua
- Aconcagua River — river of central Chile Aconcagua River
- Aconitum (aconite) — monkshood, wolfsbane and related species Aconitum
- Aconoidasida — a class of blood-infecting apicomplexan parasites Aconoidasida
- Acorales — the sweet flag order of flowering plants Acorales
- Acorn: the nut-like fruit of oak trees — description, ecology and uses Acorn
- Acorn squash (Cucurbita pepo var. turbinata) Acorn squash
- Acoustic: Sound, Science, and Musical Contexts Acoustic
- Acoustic guitar: design, history, and musical uses Acoustic guitar
- Acoustic music: definition, instruments, history and uses Acoustic music
- Acoustics: the science of mechanical waves, sound and their applications Acoustics
- Acq — commune in Pas-de-Calais, northern France Acq
- Acquarossa: municipality and administrative centre in the Blenio Valley, Ticino Acquarossa
- Acquaviva, San Marino — Castello (municipality) of the Republic Acquaviva (San Marino)
- Acqueville (Calvados) — former commune in Normandy Acqueville, Calvados
- Acquiesce (Oasis song) Acquiesce
- Acquin-Westbécourt — commune in Pas-de-Calais, northern France Acquin-Westbécourt
- Acquittal (criminal law) Acquittal
- Acre (unit of area) Acre
- Acre (Brazilian state) Acre (state)
- Acre-foot (unit of water volume) Acre foot
- Acre (Akko) — Historic port city in northern Israel Acre, Israel
- Acrididae — the short-horned grasshopper family Acrididae
- Acritarchs: organic-walled microfossils and the early eukaryote record Acritarch
- Acrobatics: physical discipline, performance and sport Acrobatics
- Acrocanthosaurus: the high‑spined theropod of the Lower Cretaceous Acrocanthosaurus
- Acrocephalus (plant): a genus in the Lamiaceae family Acrocephalus (plant)
- Acrocorinth — the fortified acropolis of ancient Corinth Acrocorinth
- Acromegaly — causes, symptoms, diagnosis, and treatment Acromegaly
- Acronym: definition, types, history and usage Acronym
- Acropolis: elevated stronghold, sacred hill, and urban center Acropolis
- Acropolis of Athens
- Across (preposition and adverb) Across
- Across the Tracks (1991) — independent drama about two brothers Across the Tracks