OP

• occipitoparietal;

• occipitoposterior;

• occiput posterior;

• octapeptide;

• olfactory peduncle;

• opening pressure;

• operation, operative;

• operative procedure;

• ophthalmology;

• opponens pollicis;

• optic neuritis;

• organophosphate;

• oropharynx;

• orthostatic proteinuria;

• osmotic pressure;

• osteoporosis;

• outpatient;

• ovine prolactin