| 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 |
| ESO | electrospinal orthosis |