heteromorphiteMin.|-ˈmɔːfaɪt| [f. as prec. + -ite.] A variety of jamesonite. 1865–72Watts Dict.Chem. III. 151 Heteromorphite, Feather ore, a sulphantimonite of lead..which occurs in capillary forms resembling a cobweb; also massive.1868Dana Min. (ed. 5) 91.