Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of naphthazarin is as below...

Naphthazarin :: Naphthazarin (n.) A dyestuff, resembling alizarin, obtained from naphthoquinone as a red crystalline substance with a bright green, metallic luster; -- called also naphthalizarin..

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