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Tachylyte :: Tachylyte (n.) A vitreous form of basalt; -- so called because decomposable by acids and readily fusible.

Frett :: Frett (n.) A vitreous compound, used by potters in glazing, consisting of lime, silica, borax, lead, and soda..

Vitrescence :: Vitrescence (n.) The quality or state of being vitreous; glassiness, or the quality of being vitrescent; capability of conversion into glass; susceptibility of being formed into glass..

Resin :: Resin (n.) Any one of a class of yellowish brown solid inflammable substances, of vegetable origin, which are nonconductors of electricity, have a vitreous fracture, and are soluble in ether, alcohol, and essential oils, but not in water; specif., pine resin (see Rosin)..

Thenardite :: Thenardite (n.) Anhydrous sodium sulphate, a mineral of a white or brown color and vitreous luster..

Eudialyte :: Eudialyte (n.) A mineral of a brownish red color and vitreous luster, consisting chiefly of the silicates of iron, zirconia, and lime..

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

Glass-rope :: Glass-rope (n.) 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..

Hyalospongia :: Hyalospongia (n. pl.) An order of vitreous sponges, having glassy six-rayed, siliceous spicules; -- called also Hexactinellinae..

Spherulite :: Spherulite (n.) A minute spherical crystalline body having a radiated structure, observed in some vitreous volcanic rocks, as obsidian and pearlstone..

Chalcocite :: Chalcocite (n.) Native copper sulphide, called also copper glance, and vitreous copper; a mineral of a black color and metallic luster..

Feldspath :: Feldspath (n.) A name given to a group of minerals, closely related in crystalline form, and all silicates of alumina with either potash, 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..

Semivitreous :: Semivitreous (a.) Partially vitreous.

Paste :: Paste (n.) A highly refractive vitreous composition, variously colored, used in making imitations of precious stones or gems. See Strass..

Melanterite :: Melanterite (n.) A hydrous sulphate of iron of a green color and vitreous luster; iron vitriol.

Reclination :: Reclination (n.) The act or process of removing a cataract, by applying the needle to its anterior surface, and depressing it into the vitreous humor in such a way that the front surface of the cataract becomes the upper one and its back surface the lower one..

Smalt :: Smalt (v. t.) A deep blue pigment or coloring material used in various arts. It is a vitreous substance made of cobalt, potash, and calcined quartz fused, and reduced to a powder..

Glass-sponge :: Glass-sponge (n.) A siliceous sponge, of the genus Hyalonema, and allied genera; -- so called from their glassy fibers or spicules; -- called also vitreous sponge. See Glass-rope, and Euplectella..

Hyaloid :: Hyaloid (a.) Resembling glass; vitriform; transparent; hyaline; as, the hyaloid membrane, a very delicate membrane inclosing the vitreous humor of the eye..

Gadolinite :: Gadolinite (n.) A mineral of a nearly black color and vitreous luster, and consisting principally of the silicates of yttrium, cerium, and iron..

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