| acerbità | Bitterkeit |
| acerbo | sauer |
| acerina | Kaulbarsch |
| acero | Ahorn |
| acero di monte | Bergahorn |
| acero montano | Bergahorn |
| Acerra | Acerra |
| acerrima nemica | Erzfeindin |
| acerrimo nemico | Erzfeind |
| Aceste | Acestes |
| acetaldeide | Acetaldehyd |
| Acetali | Acetale |
| Acetamide | Acetamid |
| acetammide | Acetamid |
| Acetanilide | Acetanilid |
| acetato | Acetat |
| Acetato di etile | Ethylacetat |
| Acetato di n-butile | Butylacetat |
| Acetato di piombo triidrato | Blei-acetat |
| Acetato di potassio | Kaliumacetat |
| Acetato di sodio | Natriumacetat |
| Acetato di vinile | Vinylacetat |
| Acetato di zinco diidrato | Zinkacetat |
| Acetato rameico monoidrato | Kupferacetat |
| acetico | essigsauer |
| Acetil-coenzima A | Acetyl-CoA |
| acetilcloruro | Essigsäurechlorid |
| Acetilcolina | Acetylcholin |
| acetilcolinesterasi | Acetylcholinesterase |
| acetilene | Azetylen |
| acetimetro | Azetometer |
| aceto | Essig |
| aceto balsamico | Balsamessig |
| aceto di riso | Reisessig |
| aceto di vino | Weinessig |
| Acetobacter | Acetobacter |
| Acetogenesi | Acetogenese |
| acetone | Azeton |
| acetonitrile | Acetonitril |
| acetosa | Sauerampfer |
| acetosella | Sauerampfer |
| acetoso | sauer |
| ACF Fiorentina | AC Florenz |
| Achain | Achain |
| Acharnes | Acharnai |
| Achatina | Achatschnecken |
| Achatina fulica | Große Achatschnecke |
| Achau | Achau |
| Achberg | Achberg |
| Achei | Achaier |
| acheilia | Acheilia |
| Acheloo | Acheloos |
| Achemenes | Achaimenes |
| Achemenidi | Achämenidenreich |
| Achen | Achen |
| Achenheim | Achenheim |
| achenio | Achäne |
| Achenkirch | Achenkirch |
| Acheo | Achaios |
| Achern | Achern |
| Achernar | Achernar |
| Acheronte | Acheron |
| Acherontia atropos | Totenkopfschwärmer |
| Achery | Achery |
| Achicourt | Achicourt |
| Achill Island | Achill Island |
| Achilla di Alessandria | Achillas von Alexandria |
| Achille | Achilleus |
| Achille Castiglioni | Achille Castiglioni |
| Achille Lauro | Achille Lauro |
| Achille Liènart | Achille Liénart |
| Achille Silvestrini | Achille Silvestrini |
| Achille Tazio | Achilleus Tatios |
| Achille Van Acker | Achille Van Acker |
| achillea millefoglie | Schafgarbe |
| Achillea millefolium | Gemeine Schafgarbe |
| Achilleo | Achilleus |
| Achilli | Achilleus |
| Achillobator giganticus | Achillobator |
| Achim von Arnim | Achim von Arnim |
| Achitofel | Ahitofel |
| Acholi | Acholi |
| Achrafieh | Aschrafiyya |
| Achslach | Achslach |
| Achstetten | Achstetten |
| Achterwehr | Achterwehr |
| Achun | Achain |
| Achzarit | Achzarit |
| Achères | Achères |
| ACI | Allgemeiner Deutscher Automobilklub |
| Aciclovir | Aciclovir |
| acicula comune | Venuskamm |
| Acid Drinkers | Acid Drinkers |
| Acid house | Acid House |
| Acid jazz | Acid Jazz |
| Acidi carbossilici | Carbonsäuren |
| Acidi grassi | Fettsäure |
| Acidi grassi trans | Transfettsäuren |
| acidi nucleici | Nukleinsäure |
| Acidi solfonici | Sulfonsäuren und Sulfonate |
| acidificare | ansäuern |
