| A/D | analog-to-digital [converter] |
|---|---|
| ADC | adult day care [facility]; affective disorders clinic; Aid to [Families with] Dependent Children; AI... |
| AHH | alpha-hydrazine analog of histidine; anosmia and hypogonadotropic hypogonadism [syndrome]; arylhydro... |
| A-to-D | analog-to-digital |
| D/A | date of accident; date of admission; digital-to-analog [converter]; discharge and advise |