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Definition of orthophyre in English:

orthophyre

Pronunciation /ˈɔːθə(ʊ)fʌɪə/

noun

rare Geology

  • A porphyritic rock containing phenocrysts chiefly of orthoclase in a feldspathic groundmass.

Origin

Mid 19th century; earliest use found in American Naturalist. From French orthophyre from ortho- + -phyre (in porphyre).