michaeliteMin.|ˈmaɪkɪlaɪt| [f. name of St. Michaels, in the Azores: see -ite.] = fiorite. 1821Webster in Amer.Jrnl.Sci. III. 391 From the island where this variety [sc. of siliceous sinter] occurs (St. Michaels) it might perhaps be distinguished by the term Michaelite.