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periclase Syllabification: per·i·clase
Pronunciation: /ˈperiˌklās/ /-ˌklāz/

Definition of periclase in English:


A colorless mineral consisting of magnesium oxide, occurring chiefly in marble and limestone.


Mid 19th century: from modern Latin periclasia, erroneously from Greek peri 'utterly' + klasis 'breaking' (because it cleaves perfectly).

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