VIT'REOUS, adjective [Latin vitreus, from vitrum, glass or woad.] 1. Pertaining to glass. 2. Consisting of glass; as a vitreous substance. 3. Resembling glass; as the vitreous humor of the eye, so called from its resembling melted glass. [See Humor.]
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI