| AST | allergy serum transfer; angiotensin sensitivity test; anterior spinothalamic tract; antistreptolysin... |
|---|---|
| AT | abdominal thrusts; achievement test; Achilles tendon; Achard-Thiers [syndrome]; adaptive thermogenes... |
| At | acidity, total; astatine; atrium, atrial |
| ATB | at the time of the bomb [A-bomb in Japan]; atrial tachycardia with block |
| At fib | atrial fibrillation |