- adrenocorticoid
- adrenocorticotropic hormone
- adrenocorticotropic hormone drugs
- adrenocorticotropin
- adrenomedullin
- Adriaan Willaert
- Adriaen van Ostade
- adriamycin
- Adrian E. Cristobal
- Adrian Frutiger
- Adriano Banchieri
- Adriatic Sea
- Adrien Brody
- Adrien-Marie Legendre
- Adrienne Rich
- ADR算法
- ADS
- AdS
- AdS5/SYM4 correspondence
- ADS-B
- ADS Bibcode
- ADS bibcode
- AdS/CFT correspondence
- AdS/CFT correspondence，Anti-de Sitter/Conformal Field Theory correspondence
- AdS/CFT对应