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syenite |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Syenite \Sy"e*nite\, n. [L. Syenites (sc. lapis), from Syene, Gr ?.] (Min.) a Orig., a rock composed of quartz, hornblende, and feldspar, anciently quarried at Syene, in Upper Egypt, and now called {granite}. b A granular, crystalline, ingeous rock composed of orthoclase and hornblende, the latter often replaced or accompanied by pyroxene or mica. Syenite sometimes contains nephelite (el[ae]olite) or leucite, and is then called {nephelite (el[ae]olite) syenite} or {leucite syenite}.
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