| marcasite | <chemical> A sulphide of iron resembling pyrite or common iron pyrites in composition, but differing in form; white iron pyrites. Golden marcasite, tin. Origin: F. Marcassite; cf. It. Marcassita, Sp. Marquesita, Pg. Marquezita; all fr. Ar. Marqashitha. Source: Websters Dictionary (01 Mar 1998) |
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