Definition of vitreous

i. In minerals, a luster typical of that of quartz or calcite.

Compare with: adamantine, pearly, resinous

ii. That degree of vitrification evidenced by low water absorption.

See Also: impermeable, nonvitreous, semivitreous

Ref: ASTM

iii. Amorphous.

iv. Noncrystalline, such as volcanic glass.

v. Consisting of or resembling glass.

Ref: Kinney