Demarcate :: Demarcate (v. t.) To mark by bounds; to set the limits of; to separate; to discriminate.
Demarcation :: Demarcation (n.) The act of marking, or of ascertaining and setting a limit; separation; distinction..
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..
Marcato :: Marcato (a.) In a marked emphatic manner; -- used adverbially as a direction.