| AAL | anterior axillary line |
|---|---|
| AALAS | American Association of Laboratory Animal Science |
| AALL | American Association for Labor Legislation |
| AAM | acute aseptic meningitis; American Academy of Microbiology; amino acid mixture; African American Male |
| AAMA | American Academy of Medical Administrators; American Association of Medical Assistants |
| AAMC | American Association of Medical Clinics; Association of American Medical Colleges |
| AAMD | American Association on Mental Deficiency; 미국 정신 박약 협회 |
| AAMD | American Academy of Medical Directors; American Association of Mental Deficiency |
| AAMD-ABS | American Association on Mental Deficiency-Adaptive Behavior Scale; 미국 정신 박약 협회 적응 행동 척도 |
| AAME | acetylarginine methyl ester |