| AFO | ankle/foot orthotic [brace or cast]; ankle-foot orthosis |
|---|---|
| AO | abdominal aorta; achievement orientation; acid output; acridine orange; ankle orthosis; anodal openi... |
| CO | carbon monoxide; cardiac output; castor oil; casualty officer; centric occlusion; cervical orthosis;... |
| CTLSO | cervicothoracolumbosacral orthosis |
| CTO | cervicothoracic orthosis |