"vitreous" in the adjective sense
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
3. glassy, vitreous, vitrified
of ceramics) having the surface made shiny and nonporous by fusing a vitreous solution to it
"hard vitreous china used for plumbing fixtures"
Source: WordNet® (An amazing lexical database of English)
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