Parenchyma. The mass or principal part of organs like the lungs or liver.
Parietal. Relating to the walls.
Paroxysm. An exacerbation of severity, in a disorder.
Parturition. Delivery; the act of bringing forth.
Pathology. The science which treats of the nature of disease.
Pectoral. Pertaining to the chest or breast.
Pediluvium. A foot bath.
Pelvis. The bony structure of the lower extremity of the body.
Percussion. The act of striking on a body to elicit sounds.
Perineum. The space between the tuberosities of the ischium, the anus, and the genitals.