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Litmus :: Litmus (n.) A dyestuff extracted from certain lichens (Roccella tinctoria, Lecanora tartarea, etc.), as a blue amorphous mass which consists of a compound of the alkaline carbonates with certain coloring matters related to orcin and orcein..

Violaniline :: Violaniline (n.) A dyestuff of the induline group, made from aniline, and used as a substitute for indigo in dyeing wool and silk a violet-blue or a gray-blue color..

Grenadine :: Grenadine (n.) A trade name for a dyestuff, consisting essentially of impure fuchsine..

Crocetin :: Crocetin (n.) A dyestuff, obtained from the Chinese crocin, which produces a brilliant yellow..

Nigraniline :: Nigraniline (n.) The complex, nitrogenous, organic base and dyestuff called also aniline black..

Flavin :: Flavin (n.) A yellow, vegetable dyestuff, resembling quercitron..

Xanthorhamnin :: Xanthorhamnin (n.) A glucoside extracted from Persian berries as a yellow crystalline powder, used as a dyestuff..

Rosolic :: Rosolic (a.) Pertaining to, or designating, a complex red dyestuff (called rosolic acid) which is analogous to rosaniline and aurin. It is produced by oxidizing a mixture of phenol and cresol, as a dark red amorphous mass, C20H16O3, which forms weak salts with bases, and stable ones with acids. Called also methyl aurin, and, formerly, corallin..

Magdala :: Magdala (a.) Designating an orange-red dyestuff obtained from naphthylamine, and called magdala red, naphthalene red, etc..

Orcein :: Orcein (n.) A reddish brown amorphous dyestuff, /, obtained from orcin, and forming the essential coloring matter of cudbear and archil. It is closely related to litmus..

Purpurin :: Purpurin (n.) A dyestuff resembling alizarin, found in madder root, and extracted as an orange or red crystalline substance..

Thionine :: Thionine (n.) An artificial red or violet dyestuff consisting of a complex sulphur derivative of certain aromatic diamines, and obtained as a dark crystalline powder; -- called also phenylene violet..

Induline :: Induline (n.) A dark green amorphous dyestuff, produced by the oxidation of aniline in the presence of copper or vanadium salts; -- called also aniline black..

Frangulin :: Frangulin (n.) A yellow crystalline dyestuff, regarded as a glucoside, extracted from a species (Rhamnus Frangula) of the buckthorn; -- called also rhamnoxanthin..

Corallin :: Corallin (n.) A yellow coal-tar dyestuff which probably consists chiefly of rosolic acid. See Aurin, and Rosolic acid under Rosolic..

Chrysoidine :: Chrysoidine (n.) An artificial, yellow, crystalline dye, C6H5N2.C6H3(NH2)2. Also, one of a group of dyestuffs resembling chrysoidine proper..

Henna :: Henna (n.) The leaves of the henna plant, or a preparation or dyestuff made from them..

Indigo :: Indigo (n.) A blue dyestuff obtained from several plants belonging to very different genera and orders; as, the woad, Isatis tinctoria, Indigofera tinctoria, I. Anil, Nereum tinctorium, etc. It is a dark blue earthy substance, tasteless and odorless, with a copper-violet luster when rubbed. Indigo does not exist in the plants as such, but is obtained by decomposition of the glycoside indican..

Safflower :: Safflower (n.) A dyestuff from these flowers. See Safranin (b).

Dye :: Dye (n.) Material used for dyeing; a dyestuff.

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