| Aswoensdag | Quarta-feira de Cinzas |
| Asymmetric Digital Subscriber Line | Asymmetric Digital Subscriber Line |
| asymmetrie | assimetria |
| asymmetrisch | assimétrico |
| Asymmetrische cryptografie | Criptografia de chave pública |
| Asymptotische vrijheid | Liberdade assintótica |
| Asynchronous JavaScript and XML | AJAX |
| Asynchronous Transfer Mode | Asynchronous Transfer Mode |
| asynchroon | fora de sincronia |
| Asyndeton | Assíndeto |
| Asystolie | Choque cardiogênico |
| At the Drive-In | At the Drive-In |
| At The Gates | At the Gates |
| AT-AT | All Terrain Armored Transport |
| Atabapo | Atabapo |
| Atacama | Deserto do Atacama |
| Atacamiet | Atacamita |
| Atahuallpa | Atahuallpa |
| Atahualpa | Atahualpa |
| Atalanta | Vanessa atalanta |
| Atalanta Bergamo | Atalanta Bergamasca Calcio |
| Atalissa | Atalissa |
| Atalja | Atália |
| Atari Jaguar | Atari Jaguar |
| Atari Lynx | Atari Lynx |
| Atari Teenage Riot | Atari Teenage Riot |
| Atascadero | Atascadero |
| Atascosa County | Condado de Atascosa |
| Atatürk Olympisch Stadion | Estádio Olímpico Atatürk |
| Atauro | Ataúro |
| atavisme | atavismo |
| atavistisch | atávico |
| Ataxie | Ataxia |
| Atbash | Atbash |
| ATC | Código ATC A |
| ATC code A | Código ATC A |
| ATC code N | Código ATC N |
| ATC-code | ATC |
| Atchison County | Condado de Atchison |
| Atelectase | Atelectasia |
| atelier | oficina |
| Atemi | Atemi |
| Athabasca | Rio Athabasca |
| Athabascameer | Rio Athabasca |
| Athalarik | Atalarico |
| Athamas | Atamante |
| Athame | Athame |
| Athanagildo | Atanagildo |
| Athanasius van Alexandrië | Atanásio de Alexandria |
| Athaulf | Ataúlfo |
| Atheens | Atena |
| Athelstan | Athelstan |
| Athelstan van Engeland | Athelstane de Inglaterra |
| Athena | Atena |
| Athenagoras van Athene | Patriarca Atenágoras I |
| Athene | Atenas |
| atheneum | escola secundária |
| Athens | Athens |
| Athens County | Condado de Athens |
| Atherton | Atherton |
| atheïsme | ateísmo |
