| Abbreviation | Definition |
|---|---|
| CNM | choroidal neovascular membrane |
| CNM | clinical nurse manager |
| CNO | Chief Nursing Officer |
| CNO | community nursing organisation |
| CNR | contrast-to-noise ratio |
| CNST | Clinical Negligence Scheme for Trusts |
| CNT | community nursing team |
| CO | C oxidase |
| CO | cabinet office |
| CO | capital out-turn |
| CO | casualty officer |
| CO | cervical orthosis |
| CO | chief officer |
| CO | childhood onset |
| CO | cholesterol oxidase |
| CO | cocaine |
| CO | coconut oil |
| CO | collagen |
| CO | complete occlusion |
| CO | coronary occlusion |