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Phenanthrene :: Phenanthrene (n.) A complex hydrocarbon, C14H10, found in coal tar, and obtained as a white crystalline substance with a bluish fluorescence..

Eugenin :: Eugenin (n.) A colorless, crystalline substance extracted from oil of cloves; -- called also clove camphor..

Wagnerite :: Wagnerite (n.) A fluophosphate of magnesia, occurring in yellowish crystals, and also in massive forms..

Orpiment :: Orpiment (n.) Arsenic sesquisulphide, produced artificially as an amorphous lemonyellow powder, and occurring naturally as a yellow crystalline mineral; -- formerly called auripigment. It is used in king's yellow, in white Indian fire, and in certain technical processes, as indigo printing..

Santal :: Santal (n.) A colorless crystalline substance, isomeric with piperonal, but having weak acid properties. It is extracted from sandalwood..

Methysticin :: Methysticin (n.) A white, silky, crystalline substance extracted from the thick rootstock of a species of pepper (Piper methysticum) of the South Sea Islands; -- called also kanakin..

Analcime :: Analcime (n.) A white or flesh-red mineral, of the zeolite family, occurring in isometric crystals. By friction, it acquires a weak electricity; hence its name..

Crystallization :: Crystallization (n.) The body formed by crystallizing; as, silver on precipitation forms arborescent crystallizations..

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

Potash :: Potash (n.) The impure potassium carbonate obtained by leaching wood ashes, either as a strong solution (lye), or as a white crystalline (pearlash)..

Dihedral :: Dihedral (a.) Having two plane faces; as, the dihedral summit of a crystal..

Chalcedony :: Chalcedony (n.) A cryptocrystalline, translucent variety of quartz, having usually a whitish color, and a luster nearly like wax..

Wrightine :: Wrightine (n.) A rare alkaloid found in the bark of an East Indian apocynaceous tree (Wrightia antidysenterica), and extracted as a bitter white crystalline substance. It was formerly used as a remedy for diarrh/a. Called also conessine, and neriine..

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

Sphenoid :: Sphenoid (n.) A wedge-shaped crystal bounded by four equal isosceles triangles. It is the hemihedral form of a square pyramid.

Jewel :: "Jewel (n.) A bearing for a pivot a pivot in a watch, formed of a crystal or precious stone, as a ruby..

Endomorph :: Endomorph (n.) A crystal of one species inclosed within one of another, as one of rutile inclosed in quartz..

Sphenoid :: Sphenoid (a.) Wedge-shaped; as, a sphenoid crystal..

Selenium :: Selenium (n.) A nonmetallic element of the sulphur group, and analogous to sulphur in its compounds. It is found in small quantities with sulphur and some sulphur ores, and obtained in the free state as a dark reddish powder or crystalline mass, or as a dark metallic-looking substance. It exhibits under the action of light a remarkable variation in electric conductivity, and is used in certain electric apparatus. Symbol Se. Atomic weight 78.9..

Levo- :: Levo- () Turning the plane of polarized light to the left; as, levotartaric acid; levoracemic acid; levogyratory crystals, etc..

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