Word Study
    periclasite
CIDE DICTIONARY
periclasite, n. [Pref. peri- + Gr.  to break.]. 
                                            
                                         A grayish or dark green mineral, consisting essentially of magnesia (magnesium oxide), occurring in granular forms or in isometric crystals.                                                                                 [1913 Webster]                                                                                                                    
                                                                                    
            For further exploring for "periclasite" in Webster Dictionary Online
        


 
    
 
