Found 2 items, similar to periclase.
English → English (WordNet) Definition: periclase periclase n : a white solid mineral that occurs naturally as periclase; a source of magnesium [syn: magnesia, magnesium oxide]
English → English (gcide) Definition: Periclase Periclase \Per"i*clase\, Periclasite \Per`i*cla"site\, n. [Pref. peri- + Gr. ? to break.] (Min.) A grayish or dark green mineral, consisting essentially of magnesia (magnesium oxide), occurring in granular forms or in isometric crystals. [1913 Webster]