a granular igneous rock consisting chiefly of orthoclase and oligoclase with hornblende, biotite, or augite.
- sy·e·nit·ic [sahy-uh-nit-ik], /ˌsaɪ əˈnɪt ɪk/, adjective
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How to use syenite in a sentence
syenite is a crystalline compound of a potash-felspar and hornblende, and quartz is frequently present.Geology | James Geikie
The obelisks of the Pharaohs are made of red granite called syenite.
The syenite granite was very hard, and capable of taking a high polish.
Of those standing, twenty-seven are made of syenite granite.
In the neighbourhood are the renowned quarries of red granite called syenite or Syenitic stone.
British Dictionary definitions for syenite
a light-coloured coarse-grained plutonic igneous rock consisting of feldspars with hornblende or biotite
- syenitic (ˌsaɪəˈnɪtɪk), adjective
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
Scientific definitions for syenite
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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