Vitreous

Vitreous may refer to:

Materials

 * Glass, an amorphous solid material
 * Vitreous enamel, a material made by fusing powdered glass to a substrate by firing
 * Vitreous lustre, a glassy luster or sheen on a mineral surface

Biology

 * Vitreous body, a clear gel that fills the space between the lens and the retina in vertebrate eyes
 * Vitreous membrane, a layer of collagen separating the vitreous body from the rest of the eye