| OH | ORAC |
|---|---|
| OH | Occupational Health |
| OH | Ocular hypertens on |
| OH | Orthostatic hypotension |
| OH-P | of Hydroxyproline |
| OHA | Oral hypoglycaemic agents |
| OHC | Outer Hair Cell |
| OHCA | Out-of-hospital cardiac arrest |
| OHHL | N-(3-oxohexanoyl)-L-homoserine lactone |
| OHIP | Oral Health Impact Profile |