a. rare. [f. L. vitr-um glass. Cf. F. vitreux, and med.L. vitrus adj.] Vitreous.
1657. Physical Dict., Vitrous humor, a moisture like to molten glass or chrystal, which is a part of the eye.
1779. Sir W. Hamilton, in Phil. Trans., LXX. 51, note. A flexible, capillary, yellow glass,… with small vitrous globules at a little distance one from the other.
1859. Mayne, Expos. Lex., 1336. Omalius admitted a genus of vitrous rocks comprehending the silicated, vitrified stones or rocks.
