| Atalanta Bergamasca Calcio | Atalanta Bergamo |
| Atalarico | Atalaryk |
| Atamante | Atamas |
| Atanasio | Atanazy |
| Atanasoff Berry Computer | Atanasoff-Berry Computer |
| Atapuerca | Atapuerca |
| Atarassia | Ataraksja |
| Atari Jaguar | Atari Jaguar |
| Atari Lynx | Atari Lynx |
| Atari POKEY | POKEY |
| Atari Teenage Riot | Atari Teenage Riot |
| Ataulfo | Ataulf |
| atavico | atawistyczny |
| atavismo | atawizm |
| Atbash | Szyfr AtBash |
| ATC | ATC |
| ATE | Ate |
| ateismo | ateizm |
| ateista | ateista |
| ateista ''lub'' | ateista |
| ateistico | ateistyczny |
| Atelidae | Czepiakowate |
| Atelocynus microtis | Wilczek krótkouchy |
| Atemi | Atemi |
| Atena | Atena |
| Atenagora di Costantinopoli | Atenagoras I |
| Atene | Ateny |
| Atenololo | Atenolol |
| ateo | ateista |
| Aterno-Pescara | Pescara |
| aterosclerosi | miażdżyca |
| ATEX | ATEX |
| Athabasca | Athabaska |
| Athanasius Kircher | Athanasius Kircher |
| Athelas | Athelas |
| Athene noctua | Pójdźka |
| Athens | Athens |
| Athesans-Étroitefontaine | Athesans-Étroitefontaine |
| Athie | Athie |
| Athienville | Athienville |
| Athies | Athies |
| Athies-sous-Laon | Athies-sous-Laon |
| Athirson | Athirson |
| Athis | Athis |
| Athis-Mons | Athis-Mons |
| Athletic Club | Athletic Bilbao |
| Athletic Club Ajaccien | AC Ajaccio |
| Athlon Classic | AMD Athlon |
| Athlon XP | AMD Athlon |
| Athos-Aspis | Athos-Aspis |
| Athose | Athose |
| Athée | Athée |
| Athée-sur-Cher | Athée-sur-Cher |
| ATI | Ati |
| ATI Hollywood | Hollywood |
| ATI Technologies | ATI Technologies |
| Atisha | Atisa |
| Atiu | Atiu |
| Atiśa | Atisa |
| Atlanta | Atlanta |
| Atlanta Braves | Atlanta Braves |
| Atlanta Falcons | Atlanta Falcons |
| Atlanta Hawks | Atlanta Hawks |
| Atlanta Thrashers | Atlanta Thrashers |
| atlante | atlas |
| Atlanti | Atlas |
| Atlantic City | Atlantic City |
| Atlantico | Atlantyk |
| Atlantide | Atlantyda |
| Atlantis | Atlantis |
| Atlantisia elpenor | Chruścielak atlantycki |
| Atlantisia rogersi | Chruścielak karłowaty |
| atleta | sportowiec |
| atletica leggera | lekkoatletyka |
| Atlántico | Atlántico |
| Atlético de Madrid | Atlético Madryt |
| ATM | ATM |
| Atman | Atman |
| Atmel AVR | Atmel AVR |
| atmosfera | atmosfera |
| Atmosfera di Marte | Atmosfera Marsa |
| Atmospheric Diving Suit | Płetwonurkowanie |
| Atol das Rocas | Rocas |
| atollo | atol |
| Atollo di Bikini | Atol Bikini |
| Atollo di Midway | Midway |
| Atollo Johnston | Johnston |
| Atom Egoyan | Atom Egoyan |
| Atomi | Atom |
| Atomic | Atom |
| Atomic Austria | Atomic |
| Atomica | Broń jądrowa |
| Atomium | Atomium |
| atomo | atom |
| Aton | Aton |
| Atossa | Atossa |
| ATP | ATP |
| ATPasi fosfolipide-traslocante | Flipaza |
| ATRAC | ATRAC |
| atrazina | atrazyna |
| Atreo | Atreus |
| Atri | Atri |
| atrio | hala |
| Atriplex | Łoboda |
| Atris | Atris |
| atroce | rozdzierający |
| atrocità | okrucieństwo |
| Atromitos | Atromitos Pireus |
| Atropa belladonna | Pokrzyk wilcza jagoda |
| Atropina | Atropina |
| Atropo | Atropos |
| ATSC | ATSC |
| Atsugi | Atsugi |
| ATTAC | ATTAC |
| attaccamento per | przywiązanie |
