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marcasite |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Marcasite \Mar"ca*site\, n. [F. marcassite; cf It marcassita Sp marquesita Pg marquezita all fr Ar marqash[=i]tha.] (Min.) A sulphide of iron resembling pyrite or common iron pyrites in composition, but differing in form white iron pyrites. {Golden marcasite}, tin. [Obs.]