a. Obs. rare. [f. L. vitre-us vitreous + -AN.] Of or resembling glass.
1656. Blount, Glossogr., Vitrean, Vitrine,… belonging to Glass, glassie, glassie-green; clear like glass, or resembling glass.
1778. W. Pryce, Min. Cornub., 60. Vitrean Ore of an irregular figure.
