| Actio de in rem verso | Actio |
| action committee | delovna skupina |
| action group | delovna skupina |
| activated carbon | aktivno oglje |
| activated sludge | aktivno blato |
| active participation | aktivna udeležba |
| active population | aktivno prebivalstvo |
| Active set | Metoda množice aktivnih omejitev |
| Active site | Aktivno mesto encima |
| Active Slovenia | Aktivna Slovenija |
| Active transport | Endocitoza |
| activity | aktívnost |
| actor | igralec |
| actress | igralka |
| actually | v bistvu |
| Actvity | Agilnost |
| Acupuncture | Akupunktura |
| acute accent | ostrivec |
| Acute pancreatitis | Akutni pankreatitis |
| Acute phase protein | Beljakovina akutne faze |
| Acute Viral Nasopharyngitis | Katar |
| Acv | Hoverkraft |
| AD | AD |
| Ad Gentes | Ad Gentes Divinitus |
| Ada | Ada |
| Ada of Caria | Ada |
| Adad | Adad |
| Adam | Adam in Eva |
| Adam and Eve | Adam in Eva |
| Adam Darski | Nergal |
| Adam Ferguson | Adam Ferguson |
| Adam Małysz | Adam Małysz |
| Adam Mickiewicz | Adam Mickiewicz |
| Adam Olearius | Adam Olearius |
| Adam Sandler | Adam Sandler |
| Adam Smith | Adam Smith |
| Adams | Adams |
| Adana | Adana |
| Adana Province | Adana |
| adapt | prilagajati |
| adaptation period | obdobje prilagajanja |
| Adapter | Tot |
| Adda River | Adda |
| addictive | zasvojljiv |
| Adding-up | Vsota |
| Addis Ababa | Adis Abeba |
| addition | seštevanje |
| Addition in N | Vsota |
| additional packaging | dodatna embalaža |
| Additionnel | Dopolnilen |
| additive | aditiv |
| Additive function | Aritmetična funkcija |
| address | naslov |
| Address list | Adresar |
| Adela | Adela |
| Adelaide | Adelaide |
| Adelaide Street Circuit | Adelaide Street Circuit |
| Adelard of Bath | Adelard |
| Adele language | Adela |
| Adenine | Adenin |
| Adenosine triphosphate | Adenozin trifosfat |
| adequate food supply | ustrezna oskrba s hrano |
| Ader Éole | Eol |
| Adewale Akinnuoye-Agbaje | Adewale Akinnuoye-Agbaje |
| ADFGVX cipher | ADFGX |
| Adhemar of Le Puy | Ademar iz Puya |
| adhesive | lepilo |
| Adiabatic process | Adiabatna sprememba |
| Adige | Adiža |
