n.
Pronunciation: p ə - ' ri-d ə - ˌ t ī t
Function: noun
Etymology: French péridotite, from péridot
Date: 1878
: any of a group of granular igneous rocks composed of ferromagnesian minerals and especially olivine
– pe · ri · do · tit · ic \ p ə - ˌ ri-d ə - ' ti-tik \ adjective