1. Consisting of, or resembling, glass; glassy; as, vitreous rocks.

2. Of or pertaining to glass; derived from glass; as, vitreous electricity. Vitreous body (Anat.), the vitreous humor. See the Note under Eye. — Vitreous electricity (Elec.), the kind of electricity excited by rubbing glass with certain substances, as silk; positive electricity; — opposed to resinous, or negative, electricity. — Vitreous humor. (Anat.) See the Note under Eye. — Vitreous sponge (Zoöl.), any one of numerous species of siliceous sponges having, often fibrous, glassy spicules which are normally six-rayed; a hexactinellid sponge. See Venus's basket, under Venus.

VITREOUSNESS
Vit"re*ous*ness, n.

Defn: The quality or state of being vitreous.

VITRESCENCE
Vi*tres"cence, n.

Defn: The quality or state of being vitreous; glassiness, or the quality of being vitrescent; capability of conversion into glass; susceptibility of being formed into glass. Kirwan.

VITRESCENT
Vi*tres"cent, a. Etym: [See Vitreous.]

Defn: Capable of being formed into glass; tending to become glass.

VITRESCIBLE
Vi*tres"ci*ble, a. Etym: [Cf. F. vitrescible.]

Defn: That may be vitrified; vitrifiable.