| A-MAT | amorphous material |
|---|---|
| A-mode | amplitude mode; amplitude modulation |
| A-NPP | absorbed normal pooled plasma |
| A-P | anteroposterior |
| A-P&L | anteroposterior and lateral |
| A-PD | anteroposterior diameter |
| A-T | ataxia telangiectasia |
| A-to-D | analog-to-digital |
| A-TP | adsorbed test plasma |
| A-V | arteriovenous; atrioventricular |