peridotite
pe·ri·do·tite
noun \pə-ˈri-də-ˌtīt\Definition of PERIDOTITE
: any of a group of granular igneous rocks composed of ferromagnesian minerals and especially olivine
— pe·ri·do·tit·ic \pə-ˌri-də-ˈti-tik\ adjective
Origin of PERIDOTITE
French péridotite, from péridot
First Known Use: 1878
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