A clear, jelly-like substance that fills the middle of the eye. Also called the vitreous humor, "humor" in medicine referring to a fluid (or semifluid) substance.

early 15c., "glasslike," from Latin vitreus "of glass, glassy," from vitrum "glass," which perhaps was so called for its color (compare vitrium "woad"). Vitreou [..]

See Vitreous Luster

of or relating to or constituting the vitreous humor of the eye; "the vitreous chamber" glassy: (of ceramics) having the surface made shiny and nonporous by fusing a vitreous [..]

glassy (pop)

(VlT-ree-us), vitreous humor. Transparent, colorless gelatinous mass that fills the rear two-thirds of the eyeball, between the lens and the retina.

Resembling glass, as in transparency, brittleness, hardness, glossiness,etc.

(adj) relating to or resembling or derived from or containing glass(adj) of or relating to or constituting the vitreous humor of the eye(adj) (of ceramics) having the surface made shiny and nonporous [..]

Glassy.

Glasslike in appearance or texture.

Luster similar to freshly broken glass; brightly reflective.

A luster of a mineral which resembles that of glass.

Luster describing minerals with reflective properties similar to that of glass.

Vitreous describes to a glass-like luster on a stone.

Having a glassy luster.

Vitreous is either something made of glass or pertaining to glass. In addition it is loosely associated with things that are deemed glasslike by having the external properties of glass. E.g. hardness, [..]