| acúfenos | Tinnitus |
| acústica | Akustik |
| Acústica arquitectónica | Raumakustik |
| acústicamente | akustisch |
| acústico | akustisch |
| AD | AD |
| ad hoc | ad hoc |
| Ad ignorantiam | Argumentum ad ignorantiam |
| Ad maiorem Dei gloriam | In maiorem Ein gloriam |
| ad náuseam | ad nauseam |
| Ad-Aware | Ad-Aware |
| Ada | Ada |
| Ada de Caria | Ada |
| Ada Falcón | Ada Falcon |
| Ada Lovelace | Ada Lovelace |
| Ada Mae Johnson | Violetta Blue |
| Adab | Adab |
| Adachi | Adachi |
| adagio | adagio |
| Adai | Adai |
| Adalbert Krüger | Adalbert Krüger |
| Adalberta | Adalberta |
| Adalberto | Adalbert |
| Adalberto de Praga | Adalbert von Prag |
| Adalberto Álvarez y su Son | Adalberto Alvarez y su Son |
| Adalia bipunctata | Zweipunkt-Marienkäfer |
| Adam | Adam |
| Adam Adalbert von Neipperg | Adam Albert von Neipperg |
| Adam Afzelius | Adam Afzelius |
| Adam Clayton | Adam Clayton |
| Adam Copeland | Adam Copeland |
| Adam Czerniaków | Adam Czerniaków |
| Adam Darski | Nergal |
| Adam de la Halle | Adam de la Halle |
| Adam Elsheimer | Adam Elsheimer |
| Adam Jerzy Czartoryski | Adam Jerzy Czartoryski |
| Adam Johann von Krusenstern | Adam Johann von Krusenstern |
| Adam Kazimierz Czartoryski | Adam Kazimierz Czartoryski |
| Adam Levine | Adam Levine |
| Adam Małysz | Adam Małysz |
| Adam Mickiewicz | Adam Mickiewicz |
| Adam Oehlenschläger | Adam Oehlenschläger |
| Adam Opel | Adam Opel |
| Adam Philippe de Custine | Adam-Philippe de Custine |
| Adam Ries | Adam Ries |
| Adam Sandler | Adam Sandler |
| Adam Smith | Adam Smith |
| Adam von Bartsch | Adam von Bartsch |
| Adam Weishaupt | Adam Weishaupt |
| Adam Zagajewski | Adam Zagajewski |
| adamantino | adamant |
| Adamantios Androutsopoulos | Adamantios Androutsopoulos |
| Adamantita | Adamant |
| Adamawa | Adamawa |
| Adamclisi | Adamclisi |
| Adamismo | Adamiten |
| Adamita | Adamin |
| Adams | Adams |
| Adamstown | Adamstown |
| Adamswiller | Adamswiller |
| adamás | weiterhin |
| Adana | Adana |
| Adana Kebap | Adana Kebap |
| Adansonia | Affenbrotbäume |
| Adansonia digitata | Afrikanischer Affenbrotbaum |
| adaptabilidad | Adaptation |
| adaptable | anpassungsfähig |
| adaptaciones ecológicas | biologische Anpassung |
| adaptación | Adaptation |
| Adaptación biológica | Evolutionäre Anpassung |
| adaptación del sistema métrico | Metrisierung |
| adaptación sensorial | Adaptation |
