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Consisting of, or resembling, glass; glassy; as, vitreous rocks.

The quality or state of being vitreous.

Partially vitreous.

Sulphide of silver; -- also called vitreous silver, or silver glance. It has a metallic luster, a lead-gray color, and is sectile like lead.

Native copper sulphide, called also copper glance, and vitreous copper; a mineral of a black color and metallic luster. [Formerly written chalcosine.]

The process of removing the vitreous glaze from porcelain, leaving the dull luster of the surface of ivory porcelian. Knight.

To deprive of glasslike character; to take away vitreous luster and transparency from.

tive pole or anode of a battery, or that is produced by friction of glass; -- called also vitreous electricity.

A mineral of a brownish red color and vitreous luster, consisting chiefly of the silicates of iron, zirconia, and lime.

terior Aqueous Chamber between h and i; l Anterior Aqueous Chamber; m Crystalline Lens; n Vitreous Humor; o Retina; p Yellow spot; q Center of blind spot; r Artery of Retina in center of the Optic Nerve.

tash, soda, lime, or, in one case, baryta. They occur in crystals and crystalline masses, vitreous in luster, and breaking rather easily in two directions at right angles to each other, or nearly so. The colors are usually white or nearly white, flesh-red, bluish, or greenish.

A vitreous compound, used by potters in glazing, consisting of lime, silica, borax, lead, and soda.

A mineral of a nearly black color and vitreous luster, and consisting principally of the silicates of yttrium, cerium, and iron.

onforming to the same general chemical formula. The commonest color is red, the luster is vitreous, and the hardness greater than that of quartz. The dodecahedron and trapezohedron are the common forms.

A remarkable vitreous sponge, of the genus Hyalonema, first brought from Japan. It has a long stem, consisting of a bundle of long and large, glassy, siliceous fibers, twisted together.

ema, and allied genera; -- so called from their glassy fibers or spicules; -- called also vitreous sponge. See Glass-rope, and Euplectella.

Made of glass; vitreous; as, a glassy substance. Bacon.

The vitreous coating of pottery or porcelain; anything used as a coating or color in glazing. See Glaze, v. t., 3. Ure.

The act or art of setting glass; the art of covering with a vitreous or glasslike substance, or of polishing or rendering glossy.

A mineral of a transparent vitreous brown color, found in the ejected masses of Vesuvius. It is a silicate of iron and magnesia, containing fluorine.