vitreous

of or relating to or constituting the vitreous humor of the eye; "the vitreous chamber"

relating to or resembling or derived from or containing glass; "vitreous rocks"; "vitreous silica"

(of ceramics) having the surface made shiny and nonporous by fusing a vitreous solution to it; "glazed pottery"; "glassy porcelain"; "hard vitreous china used for plumbing fixtures"