n. [ Gr. 'ammi`ths, 'ammi`tis, sandstone, fr. 'a`mmos or "a`mmos sand.] (Geol.) Oölite or roestone; -- written also hammite. [Obs.] [1913 Webster]
n. [ Gr. &unr_; sandy, from &unr_; sand: cf. F. psammite. ] (Min.) A species of micaceous sandstone. -- Psam*mit"ic a. [1913 Webster]