EXAMPLES | WORD ORIGIN noun a granular igneous rock consisting chiefly of orthoclase and oligoclase with hornblende, biotite, or augite. Origin of syenite 1790–1800;
) (stone) of
-ite 1 Related forms sy·e·nit·ic , [sahy- uh- nit-ik] /ˌsaɪ əˈnɪt ɪk/ adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for syenite Historical Examples of syenite British Dictionary definitions for syenite noun a light-coloured coarse-grained plutonic igneous rock consisting of feldspars with hornblende or biotite Derived Forms syenitic ( ˌsaɪəˈnɪtɪk), adjective Word Origin for syenite
C18: from French
syénite, from Latin syēnītēs lapis stone from Syene (Aswan), where it was originally quarried
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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A light-colored, coarse-grained igneous rock consisting primarily of alkali feldspar together with some mafic minerals, especially hornblende. Unlike most igneous rocks, syenite has little or no quartz. It is believed to form from the cooling of magma that forms at very high temperatures and at great depths. It is the coarse-grained equivalent of trachyte.
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