| ACD-PCR | active compression-decompression post-compression remodeling |
|---|---|
| ACH | acetylcholine; achalasia; active chronic hepatitis; adrenocortical hormone; amyotrophic cerebellar h... |
| act | actinomycin; activity, active |
| activ | active, activity |
| AHI | active hostility index; Animal Health Institute; apnea-plus-hypopnea index |