| OHC | occupational health center; outer hair cell |
|---|---|
| OHI | Occupational Health Institute; operative hypertension indicator; oral hygiene index; Oral Hygiene In... |
| OHN | occupational health nurse |
| OHP | hydroxyprogesterone; hydroxyproline; occupational health plan; Oregon Health Plan; oxygen under high... |
| OHR | occupational health research; Office of Health Research |