'Peridotite' definitions:
Definition of 'peridotite'
(from WordNet)
noun
A dark coarse-grained igneous rock consisting principally of olivine
Definition of 'Peridotite'
From: GCIDE
- Peridotite \Per"i*do*tite\, n. [Cf. F. p['e]ridotite.] (Min.) An eruptive rock characterized by the presence of chrysolite (peridot). It also usually contains pyroxene, enstatite, chromite, etc. It is often altered to serpentine. [1913 Webster]
- Note: The chief diamond deposits in South Africa occur in a more or less altered peridotite. [1913 Webster]