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ophiolite

[of-ee-uh-lahyt, oh-fee-]
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noun Geology.
  1. an assemblage of mafic igneous rocks representing remnants of former oceanic crust.

Origin of ophiolite

1840–50; < Greek óphi(s) snake + -o- + -lite; cf. ophite
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018