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Toluic :: Toluic (a.) Pertaining to, or designating, one of three metameric acids, CH3.C6H4.CO2H, which are related to toluene and analogous to benzoic acids. They are white crystalline substances, and are called respectively orthotoluic acid, metatoluic acid, and paratoluic acid..

Crystalline :: Crystalline (a.) Formed by crystallization; like crystal in texture.

Nitrophnol :: Nitrophnol (n.) Any one of a series of nitro derivatives of phenol. They are yellow oily or crystalline substances and have well-defined acid properties, as picric acid..

Limestone :: Limestone (n.) A rock consisting chiefly of calcium carbonate or carbonate of lime. It sometimes contains also magnesium carbonate, and is then called magnesian or dolomitic limestone. Crystalline limestone is called marble..

Oxamethane :: Oxamethane (n.) Ethyl oxamate, obtained as a white scaly crystalline powder..

Metacrolein :: Metacrolein (n.) A polymeric modification of acrolein obtained by heating it with caustic potash. It is a crystalline substance having an aromatic odor.

Quercitrin :: Quercitrin (n.) A glucoside extracted from the bark of the oak (Quercus) as a bitter citron-yellow crystalline substance, used as a pigment and called quercitron..

Coniferin :: Coniferin (n.) A glucoside extracted from the cambium layer of coniferous trees as a white crystalline substance.

Malamethane :: Malamethane (n.) A white crystalline substance forming the ethyl salt of malamic acid.

Diisatogen :: Diisatogen (n.) A red crystalline nitrogenous substance or artificial production, which by reduction passes directly to indigo..

Pinacone :: Pinacone (n.) A white crystalline substance related to the glycols, and made from acetone; hence, by extension, any one of a series of substances of which pinacone proper is the type..

Cinchonidine :: Cinchonidine (n.) One of the quinine group of alkaloids, found especially in red cinchona bark. It is a white crystalline substance, C19H22N2O, with a bitter taste and qualities similar to, but weaker than, quinine; -- sometimes called also cinchonidia..

Vulpic :: Vulpic (a.) Pertaining to, derived from, or designating, an acid obtained from a lichen (Cetraria vulpina) as a yellow or red crystalline substance which on decomposition yields pulvinic acid..

Saccharin :: Saccharin (n.) A bitter white crystalline substance obtained from the saccharinates and regarded as the lactone of saccharinic acid; -- so called because formerly supposed to be isomeric with cane sugar (saccharose).

Guanin :: Guanin (n.) A crystalline substance (C5H5N5O) contained in guano. It is also a constituent of the liver, pancreas, and other glands in mammals..

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..

Phorone :: Phorone (n.) A yellow crystalline substance, having a geraniumlike odor, regarded as a complex derivative of acetone, and obtained from certain camphor compounds..

Gneiss :: Gneiss (n.) A crystalline rock, consisting, like granite, of quartz, feldspar, and mica, but having these materials, especially the mica, arranged in planes, so that it breaks rather easily into coarse slabs or flags. Hornblende sometimes takes the place of the mica, and it is then called hornblendic / syenitic gneiss. Similar varieties of related rocks are also called gneiss..

Vicine :: Vicine (n.) An alkaloid ex tracted from the seeds of the vetch (Vicia sativa) as a white crystalline substance.

Santonin :: Santonin (n.) A white crystalline substance having a bitter taste, extracted from the buds of levant wormseed and used as an anthelmintic. It occassions a peculiar temporary color blindness, causing objects to appear as if seen through a yellow glass..

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