| AIBS | American Institute of Biological Sciences |
|---|---|
| AIH | amelogenesis imperfecta, hypomaturation type; American Institute of Homeopathy; artificial inseminat... |
| AIN | acute interstitial nephritis; American Institute of Nutrition; anterior interosseous nerve |
| AIPS | American Institute of Pathologic Science |
| AIUM | American Institute of Ultrasound in Medicine |