| ALAO | angiographic area of left anterior oblique projection |
|---|---|
| AlaP, ala-P | alafosfalin |
| ALARA | as low as reasonably achievable [radiation exposure] |
| ALARM | adjustable leg and ankle repositioning mechanism |
| ALAS | delta-aminolevulinate synthase |
| ALASH | delta-aminolevulinate synthase, housekeeping type |
| ALAT | alanine aminotransferase |