[of-ahyt, oh-fahyt]
noun Petrology.
a diabase in which elongate crystals of plagioclase are embedded in pyroxene.

1350–1400; Middle English ophites < Latin ophītēs serpentine stone < Greek ophī́tēs (líthos) serpentine (stone), equivalent to óph(is) serpent + -ī́tēs -ite1

ophitic [oh-fit-ik] , adjective
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World English Dictionary
ophite (ˈəʊfaɪt)
any of several greenish mottled rocks with ophitic texture, such as dolerite and diabase
[C17: from Latin ophītēs, from Greek, from ophis snake: because the mottled appearance resembles the markings of a snake]

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