(definition) by Webster 1913 Wed Dec 22 1999 at 1:54:47

Per"i*clase (?), 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.

 

© Webster 1913.

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