Home › Words › N › neoxanthinneoxanthinneoxanthin means A major xanthophyll found in green leafy vegetables. It is an intermediate in the biosynthesis of the plant hormone abscisic acid.EtymologyFrom neo- + xanthin.nounA major xanthophyll found in green leafy vegetables. It is an intermediate in the biosynthesis of the plant hormone abscisic acid.Definitions & examples from Wiktionary (CC BY-SA 3.0).