Pericarditis. Described on [page 548].
Pericardium. The membranous sac enclosing the heart.
Perineal section. An operation by division of the perineum.
Perineum. The space bounded by the end of the spine, sexual organs and the bony prominences on which one sits.
Periostium. The membranous covering to all bones.
Peristaltic motion. A worm-like movement of the bowels by which the food is moved forward.
Peritoneum. The membrane (serous) which lines the abdominal cavities and surrounds the intestines.
Peritonitis. Inflammation of serous membrane lining abdominal and pelvic cavities.
Pessaries, Pessary. An instrument for holding the womb in its place.
Pestilence. A malignant, spreading disease. A plague.