| CO | carbon monoxide; cardiac output; castor oil; casualty officer; centric occlusion; cervical orthosis;... |
|---|---|
| CRAD | central retinal artery occlusion |
| CRAO | central retinal artery occlusion |
| CRO | cathode ray oscilloscope; centric relation occlusion |
| CRVO | central retinal vein occlusion |