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peridotite
per·i·do·tite [ pèrrə dṓ tt ]


noun 
Definition:
 
kind of rock: a coarse-grained igneous rock that is rich in iron and magnesium. It is found in meteorites and also on Earth, where it is thought to form much of the Earth's core.

per·i·do·tit·ic [ pèrrədō títtik ] adjective
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