n. [ So called from Prof. Anker of Austria: cf. F. ankérite, G. ankerit. ] (Min.) A mineral closely related to dolomite, but containing iron. [ 1913 Webster ]
n. (Min.) An eruptive rock allied to trachyte, consisting essentially of a triclinic feldspar, with pyroxene, hornblende, or hypersthene. [ 1913 Webster ]