kwə̇ˈnizərə̇n noun
( -s )
Etymology: International Scientific Vocabulary quin- + al izarin
: a red crystalline compound C 14 H 6 O 2 (OH) 2 isomeric with alizarin made from phthalic anhydride and either hydroquinone or para -chlorophenol and used as a dye intermediate and organic pigment; 1,4-dihydroxy-anthraquinone — see dye table I (under Pigment Violet 12 )