Os Uteri. The mouth of the uterus; the os tincæ.

Oviduct. A duct in the Fallopian tube.

Ovulation. The formation and discharge of eggs or ovules.

Ovum. An egg; an embryo and its membranes.

Oxytocic. Having power to increase uterine pains.

Ozæna. Fetid ulcer in the nose.

Palmar. Pertaining to the interior of the hand.

Palpation. Exploring diseased parts by touching and pressure.

Papilla. Minute nipple shaped elevations in the skin and mucous membrane.

Paraplegia. Paralysis of the lower half of the body.