Main Entry: ¹vit·re·ous

Pronunciation: \ˈvi-trē-əs\

Function: 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>