xanthophylliteMin.|zænθəʊˈfɪlaɪt| [ad. G. xanthophyllit (G. Rose, 1840), f.Gr. ξανθός yellow + ϕύλλον leaf + -ite1 2 b.] A micaceous mineral, a species of seybertite, occurring in yellowish crusts or implanted globules in talcose schist. 1844Dana Min. (1862) 149.