Plasma. The colorless fluid of the blood.
Plethora. Overfullness of blood; repletion.
Pleura. The serous membrane covering the lungs.
Pleuritis. Pleurisy.
Pneumogastric. Belonging to the lungs and stomach; the eighth pair of nerves.
Post Mortem. After death.
Presentation. The part that presents.
Primapara. A woman who bears her first child.
Process. A projecting part of bones.
Prognosis. A prediction as to the course and event of a disease.