| anyż gwiazdkowy | star anise |
| anyż gwiaździsty | star anise |
| Anzelm | Anselm |
| Anzelm z Canterbury | Anselm of Canterbury |
| Anzin | Anzin |
| Anzin-Saint-Aubin | Anzin-Saint-Aubin |
| Anzing | Anzing |
| Anzio | Anzio |
| Anzonico | Anzonico |
| Anzor Kawazaszwili | Anzor Kavazashvili |
| Anzoátegui | Anzoátegui |
| Anzu | Zu |
| Anárion | Anárion |
| Aníbal Cavaco Silva | Aníbal Cavaco Silva |
| Aníbal Muñoz Duque | Anibal Muñoz Duque |
| Anórien | Anórien |
| Anżela Bałachonowa | Anzhela Balakhonova |
| Anżi Machaczkała | FC Anzhi Makhachkala |
| Anže Kopitar | Anže Kopitar |
| AO | AO |
| Aoede | Aoede |
| Aojda | Aoidos |
| AOL | AOL |
| AOL Instant Messenger | AOL Instant Messenger |
| Aon Center | Aon Center |
| Aonyx | Aonyx |
| aorta | aorta |
| Aorta człowieka | Aorta |
| aoryst | aorist |
| Aosta | Aosta |
| Aoste | Aosta |
| Aousserd | Auserd |
| Apach | Apach |
| Apache | Apache |
| Apache Ant | Apache Ant |
| Apache License | Apache License |
| Apache Maven | Apache Maven |
| Apache Tomcat | Apache Tomcat |
| Apache Xerces | Xerces |
| Apacze | Apache |
| Apalakowie | Apalachee |
| Apamea | Apamea |
| aparat | apparatus |
| Aparat administracyjny | Machine of government |
| aparat cyfrowy | digital camera |
| Aparat dalmierzowy | Rangefinder camera |
| Aparat Deana Starka | Dean-Stark apparatus |
| aparat fotograficzny | camera |
| Aparat Golgiego | Golgi apparatus |
| Aparat Ilizarowa | Ilizarov apparatus |
| aparat kompaktowy | point-and-shoot camera |
| aparat ortodontyczny, aparat na zęby | braces |
| aparat rentgenowski | X-ray unit |
| Aparat skrzynkowy | Box camera |
| Aparat Soxhlet | Soxhlet extractor |
| Aparat Webera | Weberian apparatus |
| Aparatka | Braceface |
| apartament | apartment |
| apartamentowiec | apartment block |
| apartheid | apartheid |
| aparycja | apparition |
| apaszka | scarf |
| Apate | Apate |
| apatia | apathy |
| Apatin | Apatin |
| apatyczny | apathetic |
| apatyt | apatite |
| Apatyty | Apatity |
| APEC | Asia-Pacific Economic Cooperation |
| apelacja | appeal |
| Apeldoorn | Apeldoorn |
| Apeliotes | Apeliotes |
| Apella | Apella |
| Apelles | Apelles |
| Apendycyt | Appendicitis |
| Apendyks | Email Attachment |
| Apeniny | Apennine Mountains |
| Apennins | Apennines |
| Aper Aku Stadium | Aper Aku Stadium |
| apercepcja | apperception |
| Aperea | Brazilian Guinea Pig |
| apertura | aperture |
| Apertura i Clausura | Apertura and Clausura |
| apetyt | appetite |
| Apfeldorf | Apfeldorf |
| Apfeltrach | Apfeltrach |
| APG I | APG system |
| Aphareus | Aphareus |
| Aphex Twin | Aphex Twin |
| Apia | Apia |
| APIC | Advanced Programmable Interrupt Controller |
| APICS | APICS |
| APILAS | APILAS |
| Apimondia | Apimondia |
| APIPA | Zeroconf |
| Apis cerana | Apis cerana |
| Apis dorsata | Apis dorsata |
| Apis florea | Apis florea |
| Apisai Ielemia | Apisai Ielemia |
| Apistogramma | Apistogramma |
| Apistogrammoides pucallpaensis | Apistogrammoides |
| Apiterapia | Apitherapy |
| APL | APL |
| Aplanat | Rapid Rectilinear |
| Aplet Javy | Java applet |
| aplikacja | application |
| Aplikacje przenośne | Portable application |
| aplikator | applicator |
| aplikować | apply |
| Aplit | Aplite |
| Apocalypto | Apocalypto |
| Apochromat | Apochromat |
| Apocrita | Apocrita |
| Apodemus | Apodemus |
| apodyktyczny | authoritative |
| APOEL FC | APOEL FC |
| APOEL Nikozja | APOEL FC |
| Apoenzym | Apoenzyme |
| Apofis | Apophis |
| Apofyllit | Apophyllite |
| Apogee Software | Apogee Software |
| Apogonowate | Apogonidae |
| apograf | apograph |
| Apoidea | Apoidea |
| Apokalipsa | Apocalypse |
| Apokalipsa Pawła | Coptic Apocalypse of Paul |
| Apokalipsa Piotra | Gnostic Apocalypse of Peter |
| Apokalipsa Świętego Jana | Apocalypse |
| Apokatastaza | Apocatastasis |
| apokryf | apocrypha |
| apokryficzny | apocryphal |
| Apolda | Apolda |
| Apolemichthys | Apolemichthys |
| Apollo | Apollo |
| Apollodoros | Apollodorus |
| Apollodoros z Aten | Apollodorus |
| Apollodoros z Damaszku | Apollodorus of Damascus |
| Apollon Kalamaria | Apollon Kalamarias |
| Apollon Limassol | Apollon Limassol |
| Apollonios z Rodos | Apollonius of Rhodes |
| Apolo Nsibambi | Apolo Nsibambi |
| apolog | apologue |
| apologeta | apologist |
| Apologia Konfesji Augsburskiej | Apology of the Augsburg Confession |
| Apolonia | Saint Apollonia |
| Apolonia Fier | KS Apolonia Fier |
| Apolonia z Aleksandrii | Saint Apollonia |
| Apoloniusz | Apollonius |
| Apoloniusz z Pergi | Apollonius of Perga |
| Apoloniusz z Tiany | Apollonius of Tyana |
| Apomorfina | Apomorphine |
| Apop | Apep |
| APOP Kinyras | APOP Kinyras Peyias FC |
| Apoplast | Apoplast |
| apoplektyczny | apoplectic |
| apoptoza | apoptosis |
| aporia | aporia |
| apostata | apostate |
| apostazja | apostasy |
| Apostil | Apostille |
| Apostolicam actuositatem | Apostolicam Actuositatem |
| apostolski | apostolic |
| Apostolski Kościół Ormiański | Armenian Apostolic Church |
| apostoł | apostle |
| Apostoů | Apostle |
| apostrof | apostrophe |
| Aposymbioza | Aposymbiotic |
| Apotemnofilia | Body integrity identity disorder |
| apoteoza | apotheosis |
