azo coloring matter

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• azolitmin — ˌazōˈlitmə̇n, ˌā noun ( s) Etymology: International Scientific Vocabulary az + litmus + in : a dark red nitrogenous coloring matter obtained from litmus and used as an acid base indicator …   Useful english dictionary

• dye — dyable, dyeable, adj. dyer, n. /duy/, n., v., dyed, dyeing. n. 1. a coloring material or matter. 2. a liquid containing coloring matter, for imparting a particular hue to cloth, paper, etc. 3. color or hue, esp. as produced by dyeing. 4. of the… …   Universalium

• dye — A stain or coloring matter; a compound consisting of chromophore and auxochrome groups attached to one or more benzene rings, its color being due to the chromophore and its dyeing affinities to the auxochrome. Dyes are used for intravital… …   Medical dictionary

• azolitmin — A purplish red coloring matter obtained from natural litmus or synthesized by oxidizing orcinol in the presence of ammonia, lime, and potash; used as a broad indicator of pH (red at 4.5, blue at 8.3). * * * azo·lit·min .az ō lit mən, .āz n a dark …   Medical dictionary

• pigment — /pig meuhnt/, n. 1. a dry insoluble substance, usually pulverized, which when suspended in a liquid vehicle becomes a paint, ink, etc. 2. a coloring matter or substance. 3. Biol. any substance whose presence in the tissues or cells of animals or… …   Universalium

• Feingold diet — The Feingold diet is a food elimination program developed by Ben F. Feingold, MD to treat hyperactivity. It eliminates a number of artificial colors and artificial flavors, aspartame, three petroleum based preservatives, and (at least initially)… …   Wikipedia