pio-, pi-, pion- +

(Greek: fat)

pioepithelium (s) (noun), pioepitheliums (pl)
Epithelium that holds fatty matter or globules: Pioepithelium refers to the covering of internal and external surfaces of the body, including the lining of vessels and other small cavities, and contains small particles or globules.
pionemia (s) (noun) (no pl)
The presence of an emulsion of fine oil globules in the blood; piarrhæmia: Pionemia is a form of lineman and is sometimes found in diabetes.
Piophila (s) (noun) (no pl)
A genus of small, black, dipterous insects containing the species Piophila casei of the family Muscidæ: Piophila is a taxonomic group including the "cheese fly" that deposits its eggs preferably on cheese, but also on ham, bacon, and other fatty foods.

The larvae of the Piophila casei, commonly called "cheese skippers", are a cause of intestinal myiasis, which is an invasion or infection of a body area or cavity by the larvae of flies.

piorthopnea (s) (noun), piorthopneas (pl)
Dyspnea while lying down; orthopnea: Piorthopnea refers to the difficulty and painfulness of breathing except in the erect posture, like standing or sitting, and is due to obesity.

Related fat-word units: adipo-; lard; lipo-; obeso-; oleo-; omento-; pimelo-; sebo-; steato-.