1. Licentious painting or literature; especially, the painting anciently employed to decorate the walls of rooms devoted to bacchanalian orgies.

2. (Med.)

Defn: A treatise on prostitutes, or prostitution.

POROSITY
Po*ros"i*ty, n. Etym: [Cf. F. porosité.]

Defn: The quality or state of being porous; — opposed to density.

POROTIC
Po*rot"ic, n. Etym: [Gr. (Med.)

Defn: A medicine supposed to promote the formation of callus.

POROTYPE
Po"ro*type, n. [See Pore, n., and -type.]

Defn: A copy of a print, writing, etc., made by placing it upon a chemically prepared paper which is acted upon by a gas which permeates the paper of the print, writing, etc.

POROUS
Por"ous, a. Etym: [Cf. F. poreux. See Pore, n.]