The Collaborative International Dictionary
Naphthazarin
Naphthazarin \Naph*thaz"a*rin\, n. [Naphthalene + alizarin.] (Chem.) A dyestuff, resembling alizarin, obtained from naphthoquinone as a red crystalline substance with a bright green, metallic luster; -- called also naphthalizarin.
Wiktionary
naphthazarin
n. (context chemistry English) A dyestuff, resembling alizarin, obtained from naphthoquinone as a red crystalline substance with a bright green, metallic lustre.