| AHI | active hostility index; Animal Health Institute; apnea-plus-hypopnea index |
|---|---|
| AMC | academic medical center; acetylmethyl carbinol; Animal Medical Center; antibody-mediated cytotoxicit... |
| APF | acidulated phosphofluoride; American Psychological Foundation; anabolism-promoting factor; animal pr... |
| APG | acid-precipitated globulin; ambulatory patient group; animal pituitary gonadotropin; antegrade pyelo... |
| APHIS | Animal and Plant Health Inspection Service |