Pediculus (pe-dik'-u-lus). The louse.
Pelvis (pel'-vis). A basin or basin-shaped cavity. The bony ring formed by
sacrum and coccyx and innominate bones.
Pepsin (pep'-sin). A ferment found in the gastric juice, and capable of
digesting proteids in the presence of an acid.
Percussion (per-kush'-in). Striking upon a part to ascertain the condition
of the underlying organs.
Pericardium (per-e-kar'de-um). The closed membranous sac enveloping the
heart.
Pericarditis (per-e-kar'-di-tis). Inflammation of the pericardium.
Perineum (per-e-ne'um). That portion of the body included in the outlet of the pelvis, bounded in front by the pubic arch, behind by the coccyx, and ligaments and on the sides by the projections of the ichium.
Periodicity (pcr-e-o-dis'ite). Recurrence at regular intervals.
Periosteum (per-e-os'teum). Covering of parts of the bone except where the
tendons and ligaments are attached to the joint surfaces.
Peristaltic (per-e-stal'tik). Pertaining to peristalsis, an wave-like
motion seen in the tubes, like bowels, etc.