| AAAE | amino acid activating enzyme |
|---|---|
| AADC | amino acid decarboxylase |
| AAM | acute aseptic meningitis; American Academy of Microbiology; amino acid mixture; African American Mal... |
| AAO | American Academy of Osteopathy; American Academy of Ophthalmology; American Academy of Optometry; Am... |
| AOAA | amino-oxyacetic acid |