| Abbreviation | Definition |
|---|---|
| CN | clinical nursing |
| CN | coagulation necrosis |
| CN | cochlear nucleus |
| CN | cognitively normal |
| CN | colloid nodules |
| CN | congeital nevus |
| CN | congenital neutropaenia |
| CN | congenital nystagmus |
| CN | contrast nephropathy |
| CN | control |
| CN | copy number |
| CN | cortical necrosis |
| CN | cranial nerve(s) |
| CN | cremaster nucleus |
| CN | Crigler-Najjar |
| CN | cuneate nucleus |
| CN | cyclic neutropenia |
| CN | cyclic nucleotide |
| CN | cystic nephroma |
| CNM | centronuclear myopathy |