Peristaltic. Vermicular or wormlike.

Peritoneum. A serous membrane lining the abdominal cavity.

Pertussis. Whooping cough.

Pessary. An instrument to support the uterus when introduced into the vagina.

Petechia. Spots which appear on the skin in malignant fever.

Pharmacopœia. A treatise describing the preparation of all kinds of medicine.

Pharynx. The upper part of the œsophagus.

Phthisis. Consumption.

Physiology. The science of the properties and functions of living beings.

Placenta. The after birth.