Mar"ca*site (?), n. [F. marcassite; cf. It. marcassita, Sp. marquesita, Pg. marquezita; all fr. Ar. marqashitha.] Min.
A sulphide of iron resembling pyrite or common iron pyrites in composition, but differing in form; white iron pyrites.
Golden marcasite, tin. [Obs.]
© Webster 1913.