Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of marcasite is as below...

Marcasite :: Marcasite (n.) A sulphide of iron resembling pyrite or common iron pyrites in composition, but differing in form; white iron pyrites..

Marcasitical :: Marcasitical (a.) Containing, or having the nature of, marcasite..

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