ə̇nˈdanˌthrōn noun
( -s )
Etymology: obsolete English indanthr ene indanthrone (International Scientific Vocabulary ind- (II) + -anthrene; probably originally formed as German indanthren ) + English -one
: a blue anthraquinone-azine dye that is the parent compound of several halogenated dyes — see dye table I (under Vat Blue 4 )