| ONC | oncogene; oncology; Orthopaedic Nursing Certificate; over-the-needle catheter |
|---|---|
| OND | Ophthalmic Nursing Diploma; orbitonasal dislocation; other neurological disorders |
| ONP | operating nursing procedure; orthonitrophenyl |
| ONS | Oncology Nursing Society |
| PCN | penicillin; primary care nursing |