peridotite

 
Pronunciation: /ˈpɛrɪdɒtʌɪt/

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

peridotitic

Pronunciation: /-ˈtɪtɪk/
adjective