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ed on the perplexities of mine host. W. Irving. Aqueous humor, Crystalline humor or lens, Vitreous humor. (Anat.) See Eye. -- Out of humor, dissatisfied; displeased; in an unpleasant frame of mind.

m; transparent; hyaline; as, the hyaloid membrane, a very delicate membrane inclosing the vitreous humor of the eye.

An order of vitreous sponges, having glassy six-rayed, siliceous spicules; -- called also Hexactinellinæ.

A silicate of alumina, iron, and magnesia, having a bright blue color and vitreous luster; cordierite. It is remarkable for its dichroism, and is also called dichroite.

A mineral, of a white color and vitreous luster. It is a hydrous silicate of alumina and lime. Exposed to the air, it loses water, becomes opaque, and crumbles. [Written also laumonite.]

A hydrous sulphate of iron of a green color and vitreous luster; iron vitriol.

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

A vascular pigmented membrane projecting into the vitreous humor within the globe of the eye in birds, and in many reptiles and fishes; -- also called marsupium.

ery attached to the plate that is not attacked by the exciting liquid; -- formerly called vitreous electricity; -- opposed to Ant: negative electricity. -- Positive eyepiece. See under Eyepiece. -- Positive law. See Municipal law, under Law. -- Positive motion (Mach.), motion which is derived from a driver through u…

ng a cataract, by applying the needle to its anterior surface, and depressing it into the vitreous humor in such a way that front surface of the cataract becomes the upper one and its back surface the lower one. Dunglison.

flammable 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).

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.

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

ponge (Spongia equina, variety meandriniformis) found in Florida and the West Indies. -- Vitreous sponge. See Glass-sponge. -- Yellow sponge, a common and valuable commercial sponge (Spongia agaricina, variety corlosia) found in Florida and the West Indies.

a sentence, or of humors in the eye. Sparkling synchysis (Med.), a condition in which the vitreous humor is softened and contains sparkling scales of cholesterin.

A vitreous form of basalt; -- so called because decompposable by acids and readily fusible.

Anhydrous sodium sulphate, a mineral of a white or brown color and vitreous luster.

A translucent mineral of a green color and pearly or vitreous luster. It is a hydrous arseniate of copper.

Containing or exhibiting positive, or vitreous, electricity.

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. Kirwan.