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Valeramide :: Valeramide (n.) The acid amide derivative of valeric acid, obtained as a white crystalline substance..

Holocrystalline :: Holocrystalline (a.) Completely crystalline; -- said of a rock like granite, all the constituents of which are crystalline..

Tropic :: Tropic (a.) Of, pertaining to, or designating, an acid obtained from atropine and certain other alkaloids, as a white crystalline substance slightly soluble in water..

Pyrocatechin :: Pyrocatechin (n.) A white crystalline substance, C6H4(OH)2, of the phenol series, found in various plants; -- so called because first obtained by distillation of gum catechu. Called also catechol, oxyphenol. etc..

Euchroite :: Euchroite (n.) A mineral occurring in transparent emerald green crystals. It is hydrous arseniate of copper.

Polymorph :: Polymorph (n.) A substance capable of crystallizing in several distinct forms; also, any one of these forms. Cf. Allomorph..

Heulandite :: Heulandite (n.) A mineral of the Zeolite family, often occurring in amygdaloid, in foliated masses, and also in monoclinic crystals with pearly luster on the cleavage face. It is a hydrous silicate of alumina and lime..

Thinolite :: Thinolite (n.) A calcareous tufa, in part crystalline, occurring on a large scale as a shore deposit about the Quaternary lake basins of Nevada..

Veratrine :: Veratrine (n.) A poisonous alkaloid obtained from the root hellebore (Veratrum) and from sabadilla seeds as a white crystalline powder, having an acrid, burning taste. It is sometimes used externally, as in ointments, in the local treatment of neuralgia and rheumatism. Called also veratria, and veratrina..

Igasurine :: Igasurine (n.) An alkaloid found in nux vomica, and extracted as a white crystalline substance..

Radiated :: Radiated (a.) Formed of, or arranged like, rays or radii; having parts or markings diverging, like radii, from a common center or axis; as, a radiated structure; a radiated group of crystals..

Levorotatory :: Levorotatory (a.) Turning or rotating the plane of polarization towards the left; levogyrate, as levulose, left-handed quartz crystals, etc..

Crystallin :: Crystallin (n.) See Gobulin.

Daphnin :: Daphnin (n.) A white, crystalline, bitter substance, regarded as a glucoside, and extracted from Daphne mezereum and D. alpina..

Hydrophlorone :: Hydrophlorone (n.) A white, crystalline benzene derivative, C8H10O2, obtained by the reduction of phlorone..

Saltpetre :: Saltpetre (n.) Potassium nitrate; niter; a white crystalline substance, KNO3, having a cooling saline taste, obtained by leaching from certain soils in which it is produced by the process of nitrification (see Nitrification, 2). It is a strong oxidizer, is the chief constituent of gunpowder, and is also used as an antiseptic in curing meat, and in medicine as a diuretic, diaphoretic, and refrigerant..

Cubical :: Cubical (a.) Isometric or monometric; as, cubic cleavage. See Crystallization..

Asterism :: Asterism (n.) An optical property of some crystals which exhibit a star-shaped by reflected light, as star sapphire, or by transmitted light, as some mica..

Pseudomorphism :: Pseudomorphism (n.) The state of having, or the property of taking, a crystalline form unlike that which belongs to the species..

Cassiterite :: Cassiterite (n.) Native tin dioxide; tin stone; a mineral occurring in tetragonal crystals of reddish brown color, and brilliant adamantine luster; also massive, sometimes in compact forms with concentric fibrous structure resembling wood (wood tin), also in rolled fragments or pebbly (Stream tin). It is the chief source of metallic tin. See Black tin, under Black..

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