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

Luteolin :: Luteolin (n.) A yellow dyestuff obtained from the foliage of the dyer's broom (Reseda luteola).

Indophenol :: Indophenol (n.) Any one of a series of artificial blue dyestuffs, resembling indigo in appearance, and obtained by the action of phenol on certain nitrogenous derivatives of quinone. Simple indophenol proper has not yet been isolated..

Safranin :: Safranin (n.) An orange-red dyestuff extracted from the saffron.

Safflower :: Safflower (n.) An annual composite plant (Carthamus tinctorius), the flowers of which are used as a dyestuff and in making rouge; bastard, or false, saffron..

Safranin :: Safranin (n.) A red dyestuff extracted from the safflower, and formerly used in dyeing wool, silk, and cotton pink and scarlet; -- called also Spanish red, China lake, and carthamin..

Gallein :: Gallein (n.) A red crystalline dyestuff, obtained by heating together pyrogallic and phthalic acids..

Erythrosin :: Erythrosin (n.) A red dyestuff obtained from fluorescein by the action of iodine.

Chay Root :: Chay root () The root of the Oldenlandia umbellata, native in India, which yieds a durable red dyestuff..

Flavaniline :: Flavaniline (n.) A yellow, crystalline, organic dyestuff, C16H14N2, of artifical production. It is a strong base, and is a complex derivative of aniline and quinoline..

Woad :: Woad (n.) A blue dyestuff, or coloring matter, consisting of the powdered and fermented leaves of the Isatis tinctoria. It is now superseded by indigo, but is somewhat used with indigo as a ferment in dyeing..

Eosin :: Eosin (n.) A yellow or brownish red dyestuff obtained by the action of bromine on fluorescein, and named from the fine rose-red which it imparts to silk. It is also used for making a fine red ink. Its solution is fluorescent..

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..

Vesuvine :: Vesuvine (n.) A trade name for a brown dyestuff obtained from certain basic azo compounds of benzene; -- called also Bismarck brown, Manchester brown, etc..

Dye :: Dye (v. t.) To stain; to color; to give a new and permanent color to, as by the application of dyestuffs..

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..

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

Mauveine :: Mauveine (n.) An artificial organic base, obtained by oxidizing a mixture of aniline and toluidine, and valuable for the dyestuffs it forms..

Resorcin :: Resorcin (n.) A colorless crystalline substance of the phenol series, obtained by melting certain resins, as galbanum, asafetida, etc., with caustic potash. It is also produced artificially and used in making certain dyestuffs, as phthalein, fluorescein, and eosin..

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

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