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periclase

Pronunciation: /ˈpɛrɪkleɪz, -s/

Definition of periclase

noun

[mass noun]
  • a colourless mineral consisting of magnesium oxide, occurring chiefly in marble and limestone.

Origin:

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

periclase in other Oxford dictionaries

Definition of periclase in the US English dictionary

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