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tephrite

[tef-rahyt] /ˈtɛf raɪt/
noun, Petrography
1.
a basaltic rock consisting essentially of pyroxene and plagioclase with nepheline or leucite.
Origin
1875-1880
1875-80; < Greek tephr(ós) ash-colored + -ite1
Related forms
tephritic
[tef-rit-ik] /tɛfˈrɪt ɪk/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for tephritic

tephrite

/ˈtɛfraɪt/
noun
1.
a variety of basalt containing plagioclase, augite, and a feldspathoid, commonly nepheline, or leucite
Derived Forms
tephritic (tɪˈfrɪtɪk) adjective
Word Origin
C17: from Greek tephros, from tephra ashes; see -ite1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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