(anatomy) In mammals, the serous membrane lining the cavity of the abdomen and that is folded over the viscera. / (zoology) In animals, the membrane lining the coelom cavity.

(pathology) Inflammation of the peritoneum, especially when caused by an infectious organism introduced into the abdominal cavity

(neuroanatomy) The part of the nervous system which is not the central nervous system.

(historical) An Ancient Greek politician. / A male given name from Ancient Greek of mostly historical use.

A form of viewing device that allows the viewer to see things at a different height level and usually with minimal visibility. / (obsolete): A general or comprehensive view.

(intransitive) To rise and peer around, in the manner of a periscope.

Extremely cold. / Extreme; used of environmental or bodily conditions.

present participle of perish

The act of something that perishes; decay or destruction.

(medicine) The rhythmic, wave-like contraction and relaxation of muscles so as to propagate motion, as of food in the digestive tract.