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Aragonite :: Aragonite (n.) A mineral identical in composition with calcite or carbonate of lime, but differing from it in its crystalline form and some of its physical characters..

Xanthamide :: Xanthamide (n.) An amido derivative of xanthic acid obtained as a white crystalline substance, C2H5O.CS.NH2; -- called also xanthogen amide..

Persulphocyanic :: Persulphocyanic (a.) Pertaining to, or designating, a yellow crystalline substance (called also perthiocyanic acid), analogous to sulphocyanic acid, but containing more sulphur..

Curarine :: Curarine (n.) A deadly alkaloid extracted from the curare poison and from the Strychnos toxifera. It is obtained in crystalline colorless salts.

Durene :: Durene (n.) A colorless, crystalline, aromatic hydrocarbon, C6H2(CH3)4, off artificial production, with an odor like camphor..

Quinine :: Quinine (n.) An alkaloid extracted from the bark of several species of cinchona (esp. Cinchona Calisaya) as a bitter white crystalline substance, C20H24N2O2. Hence, by extension (Med.), any of the salts of this alkaloid, as the acetate, chloride, sulphate, etc., employed as a febrifuge or antiperiodic. Called also quinia, quinina, etc..

Itaconic :: Itaconic (a.) Pertaining to, or designating, an acid, C5H6O4, which is obtained as a white crystalline substance by decomposing aconitic and other organic acids..

Umbelliferone :: Umbelliferone (n.) A tasteless white crystalline substance, C9H6O3, found in the bark of a certain plant (Daphne Mezereum), and also obtained by the distillation of certain gums from the Umbelliferae, as galbanum, asafetida, etc. It is analogous to coumarin. Called also hydroxy-coumarin..

Tin :: Tin (n.) An elementary substance found as an oxide in the mineral cassiterite, and reduced as a soft white crystalline metal, malleable at ordinary temperatures, but brittle when heated. It is not easily oxidized in the air, and is used chiefly to coat iron to protect it from rusting, in the form of tin foil with mercury to form the reflective surface of mirrors, and in solder, bronze, speculum metal, and other alloys. Its compounds are designated as stannous, or stannic. Symbol Sn (Stannum). At

Colloid :: Colloid (n.) A substance (as albumin, gum, gelatin, etc.) which is of a gelatinous rather than a crystalline nature, and which diffuses itself through animal membranes or vegetable parchment more slowly than crystalloids do; -- opposed to crystalloid..

Xylamide :: Xylamide (n.) An acid amide derivative of xylic acid, obtained as a white crystalline substance..

Pilocarpine :: Pilocarpine (n.) An alkaloid extracted from jaborandi (Pilocarpus pennatifolius) as a white amorphous or crystalline substance which has a peculiar effect on the vasomotor system.

Nitroform :: Nitroform (n.) A nitro derivative of methane, analogous to chloroform, obtained as a colorless oily or crystalline substance, CH.(NO2)3, quite explosive, and having well-defined acid properties..

Xylorcin :: Xylorcin (n.) A derivative of xylene obtained as a white crystalline substance which on exposure in the air becomes red; -- called also betaorcin.

Thionoline :: Thionoline (n.) A beautiful fluorescent crystalline substance, intermediate in composition between thionol and thionine..

Bay Salt :: Bay salt () Salt which has been obtained from sea water, by evaporation in shallow pits or basins, by the heat of the sun; the large crystalline salt of commerce..

Onocerin :: Onocerin (n.) A white crystalline waxy substance extracted from the root of the leguminous plant Ononis spinosa.

Travertine :: Travertine (n.) A white concretionary form of calcium carbonate, usually hard and semicrystalline. It is deposited from the water of springs or streams holding lime in solution. Extensive deposits exist at Tivoli, near Rome..

Fumarine :: Fumarine (n.) An alkaloid extracted from fumitory, as a white crystalline substance..

Gelseminic :: Gelseminic (n.) Pertaining to, or derived from, the yellow jasmine (Gelsemium sempervirens); as, gelseminic acid, a white crystalline substance resembling esculin..

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