#vitreous

Adjective

[vi-tree-uhs ]

1. of the nature of or resembling glass, as in transparency, brittleness, hardness, glossiness, etc.:
    vitreous china.

2. of or relating to glass.

3. obtained from or containing glass.

Origin:
1640–50; <Latin vitreus, equivalent to vitr(um)glass + -eus-eous

“This he dropped into some molten lead, but it was nearly all exhaled in smoke, and the residue was simply of a vitreous character.”
- WILLIAM HENRY DAVENPORT ADAMS, WITCH, WARLOCK, AND MAGICIAN