peridotitePronunciation: /ˈpɛrɪdɒtʌɪt/Definition of peridotite noun [mass noun] Geology a dense, coarse-grained plutonic rock containing a large amount of olivine, believed to be the main constituent of the earth’s mantle. Derivatives peridotiticPronunciation: /-ˈtɪtɪk/ adjective peridotite in other Oxford dictionaries Definition of peridotite in the US English dictionary
