| Name | Description |
|---|---|
| Orchitis | Inflammation of the testis. |
| Otalgia | Pain in the ear or earache. |
| Otitis | Inflammation of the ear. |
| Otorrhoea | A purulent discharge from the ear. |
| Oxytocic | Hastens child birth; promotes the rapidity of labour. |
| Ozoena | Atrophic condition of the nasal mucous membrane with associated cristing and foetor. |
| Palsy | paralysis. |
| Paralysis | Loss of power of movement or action. |
| Parasiticidal | An agent that destroys parasites. |
| Parturition | Child birth; labour. |
