syenite

[sahy-uh-nahyt]

Origin of syenite

1790–1800; < Latin syēnītēs (lapis) (stone) of Syene < Greek syēnī́tēs (líthos); see -ite1
Related formssy·e·nit·ic [sahy-uh-nit-ik] /ˌsaɪ əˈnɪt ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for syenite

syenite

noun
  1. a light-coloured coarse-grained plutonic igneous rock consisting of feldspars with hornblende or biotite
Derived Formssyenitic (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 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

syenite in Science

syenite

[sīə-nīt′]
  1. 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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.