noun🔗SharePeridotitaA rock consisting of small crystals of olivine, pyroxene and hornblende; the major constituent of the Earth's mantle."The geologist studied the peridotite sample, knowing it represented a piece of the Earth's mantle. "El geólogo estudió la muestra de peridotita, sabiendo que representaba una parte del manto terrestre.geologymaterialmineralChat with AIVocabulary GamePractice Reading