| Ator | Ator |
| Atorvastatine | Atorvastatin |
| Atossa | Atossa |
| Atoum | Atum |
| atout | plus |
| atout dans la manche | ace in the hole |
| Atovaquone | Atovaquone |
| ATP | ATP |
| ATP synthase | ATP synthase |
| ATP Tour | Association of Tennis Professionals |
| ATPase | ATPase |
| ATR | ATR |
| atrabilaire | bilious |
| Atractaspididae | Atractaspididae |
| Atracurium | Atracurium |
| Atrahasis | Atra-Hasis |
| Atrak | Atrek River |
| Atrani | Atrani |
| Atrato | Atrato River |
| Atrazine | Atrazine |
| Atrebates | Atrebates |
| Atrides | Atreidae |
| Atriplex | Atriplex |
| atrium | atrium |
| atroce | horrible |
| atrocité | cruelty |
| Atromitos FC | Atromitos |
| Atropatene | Atropatene |
| Atropatès | Atropates |
| Atrope | Deadly nightshade |
| Atrophaneura hector | Atrophaneura hector |
| Atrophaneura polyeuctes | Atrophaneura polyeuctes |
| atrophie | atrophy |
| atrophié | atrophied |
| Atropine | Atropine |
| Atrée | Atreus |
| Atrésie biliaire | Biliary atresia |
| Atsina | Gros Ventres |
| Atsushi Yanagisawa | Atsushi Yanagisawa |
| Atsuta-jingû | Atsuta Shrine |
| Atta | Atta |
| attachant | connecting |
| attache | attachment |
| attachement | attachment |
| attacher | bind |
| attacher avec une courroie | strap down |
| attacher avec une sangle | strap down |
| attacher beaucoup de prix à | prize |
| attacher de nouveau | tie up again |
