I. ˈvi-trē-əs adjective
Etymology: Middle English, from Latin, from vitrum glass
Date: 14th century
1.
a. : resembling glass (as in color, composition, brittleness, or luster) : glassy
vitreous rocks
b. : characterized by low porosity and usually translucence due to the presence of a glassy phase
vitreous china
2. : of, relating to, derived from, or consisting of glass
3. : of, relating to, or constituting the vitreous humor
vitreous surgery
II. noun
Date: 1869
: vitreous humor