'Periclase' definitions:
Definition of 'periclase'
From: WordNet
noun
A white solid mineral that occurs naturally as periclase; a source of magnesium [syn: periclase, magnesia, magnesium oxide]
Definition of 'Periclase'
From: GCIDE
- 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]