[ mon-zuh-nahyt ]
/ ˈmɒn zəˌnaɪt /


any of a group of granular igneous rocks having approximately equal amounts of orthoclase and plagioclase feldspar, intermediate in composition between syenite and diorite.

Origin of monzonite

1880–85; < German Monzonit, named after Monzoni, mountain in Tyrol; see -ite1

Related forms

mon·zo·nit·ic [mon-zuh-nit-ik] /ˌmɒn zəˈnɪt ɪk/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for monzonite


/ (ˈmɒnzəˌnaɪt) /


a coarse-grained plutonic igneous rock consisting of equal amounts of plagioclase and orthoclase feldspar, with ferromagnesian minerals

Derived Forms

monzonitic (ˌmɒnzəˈnɪtɪk), adjective

Word Origin for monzonite

C19: from German, named after Monzoni, Tyrolean mountain where it was found
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

Science definitions for monzonite


[ mŏn-zōnīt′, mŏnzə-nīt′ ]

An igneous rock composed chiefly of plagioclase and orthoclase, with small amounts of amphibole, pyroxene, and biotite. Monzonite contains little or no quartz.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.