| Armênios | Armeni |
| Armínio | Arminio |
| Armórica | Armorica |
| ARN | RNA |
| ARN mensageiro | RNA messaggero |
| ARN ribossômico | RNA ribosomiale |
| ARN transportador | RNA transfer |
| ARN-polimerase | RNA polimerasi |
| Arnac | Arnac |
| Arnaldo de Brescia | Arnaldo da Brescia |
| Arnaldo Forlani | Arnaldo Forlani |
| Arnaldo Janssen | Arnold Janssen |
| Arnay-le-Duc | Arnay-le-Duc |
| Arnay-sous-Vitteaux | Arnay-sous-Vitteaux |
| Arnbruck | Arnbruck |
| Arne Friedrich | Arne Friedrich |
| Arne Wilhelm Kaurin Tiselius | Arne Tiselius |
| Arnex-sur-Nyon | Arnex-sur-Nyon |
| Arnex-sur-Orbe | Arnex-sur-Orbe |
| Arnhemia | Arnhem |
| Arni | Arni |
| arnica | arnica |
| Arnicourt | Arnicourt |
| Arnières-sur-Iton | Arnières-sur-Iton |
| Arno Allan Penzias | Arno Penzias |
| Arnold | Arnold |
| Arnold Rüütel | Arnold Rüütel |
| Arnold Schwarzenegger | Arnold Schwarzenegger |
| Arnold Schönberg | Arnold Schönberg |
| Arnold Sommerfeld | Arnold Sommerfeld |
| Arnold Van Gennep | Arnold Van Gennep |
| Arnolfo di Cambio | Arnolfo di Cambio |
| Arnor | Arnor |
| Arnos | Arnos |
| Arnsberg | Arnsberg |
| Arnschwang | Arnschwang |
| Arnstadt | Arnstadt |
| Arnéguy | Arnéguy |
| Arnês | Imbragatura |
| aro | aro |
| Arogno | Arogno |
| aroma | aroma |
| aromatizantes | aroma |
| Aromeno | Lingua arumena |
| aromático | aromatico |
| Arona | Arona |
| Arosa | Arosa |
| Arosio | Arosio |
| Aroue-Ithorots-Olhaïby | Aroue-Ithorots-Olhaïby |
| Around the Sun | Around the Sun |
| Arpachade | Arpacsad |
| Arpad Elo | Arpad Emrick Elo |
| Arpajon-sur-Cère | Arpajon-sur-Cère |
| ARPANET | ARPANET |
| arpejo | arpeggio |
| Arpheuilles | Arpheuilles |
| Arpheuilles-Saint-Priest | Arpheuilles-Saint-Priest |
| arpão | arpione |
| arqueado | incurvato |
