| additional income | ingresos adicionales |
| additional information | información adicional |
| Additional item | Línea adicional |
| additional packaging | envase adicional |
| additionally | además |
| additive | adicional |
| Additive color | Síntesis aditiva de color |
| Additive function | Función multiplicativa |
| Additive group | Grupo aditivo |
| Additive synthesis | Síntesis aditiva |
| addle | confundir |
| addled | confuso |
| address | dirección |
| Address list | Almanaque |
| addressee | destinatario |
| Addressograph | Adresógrafo |
| adduce | citar |
| adductor | aductor |
| Adductor longus muscle | Aductor mediano del muslo |
| Adductor magnus muscle | Aductor mayor del muslo |
| Adductor pollicis muscle | Aductor del pulgar |
| ade | fachada |
| Adeccoligaen | Adeccoligaen |
| Adela | Adela |
| Adela Noriega | Adela Noriega |
| Adela of Normandy | Adela de Normandía |
| Adelaide | Adelaida |
| Adelaide Football Club | Adelaide Crows |
| Adelaide Island | Isla Adelaida |
| Adelaide of Aquitaine | Adelaida de Aquitania |
| Adelaide of Italy | Adelaida |
| Adelaide of Maurienne | Adela de Saboya |
| Adelaide of Saxe-Meiningen | Adelaida de Sajonia-Meiningen |
| Adelaide of Susa | Adelaida de Susa |
| Adelaide Street Circuit | Circuito callejero de Adelaida |
| Adelaide United FC | Adelaide United Football Club |
| Adelard of Bath | Adelardo de Bath |
| Adelardo Rodríguez | Adelardo Rodríguez |
| Adelbert von Chamisso | Adelbert von Chamisso |
| Adelboden | Adelboden |
| Adelchis of Benevento | Adelchis de Benevento |
| Adele language | Idioma adele |
| Adele Stephens | Adele Stevens |
| Adelie penguin | pingüino adelia |
| Adelina Patti | Adelina Patti |
| Adeline Software International | Adeline Software International |
| Adeliza of Leuven | Adela de Louvain |
| Adelobasileus cromptoni | Adelobasileus |
| Adelphopoiesis | Adelphopoiesis |
| Ademir Marques de Menezes | Ademir Marques de Menezes |
| Aden | Adén |
| Aden Abdullah Osman Daar | Aden Abdullah Osman Daar |
| adenectomy | adenectomía |
| Adenet Le Roi | Adenet Le Roi |
| adenine | adenina |
| adenitis | adenitis |
| Adenium | Adenium |
| Adenocalymna | Adenocalymna |
| adenoid | adenoide |
| adenoidectomy | adenoidectomía |
| adenoids | adenoides |
| adenosine | adenosina |
| Adenosine diphosphate | Adenosín difosfato |
| adenosine triphosphate | trifosfato de adenosina |
| Adenoviridae | Adenovirus |
| Adenylate cyclase | Adenilato ciclasa |
| Adenylate kinase | Adenilato kinasa |
| Adephaga | Adephaga |
| adept | partidario |
| Adept Manager | Adept |
| adeptly | diestramente |
| adeptness | destreza |
| adequacy | adecuación |
| adequate | adecuado |
