EXAMPLES | WORD ORIGIN noun a granular igneous rock consisting essentially of plagioclase feldspar and hornblende. Origin of diorite 1820–30;
) to distinguish (see
French -ite -ite 1 Related forms di·o·rit·ic , [dahy- uh- rit-ik] /ˌdaɪ əˈrɪt ɪk/ adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for diorite Historical Examples of diorite British Dictionary definitions for diorite noun a dark coarse-grained igneous plutonic rock consisting of plagioclase feldspar and ferromagnesian minerals such as hornblende Derived Forms dioritic ( ˌdaɪəˈrɪtɪk), adjective Word Origin for diorite
C19: from French, from Greek
diorizein to distinguish (from dia- apart + horizein to define) + -ite 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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A gray, coarse-grained plutonic rock. Diorite consists mainly of sodium-rich plagioclase and one or more mafic minerals such as biotite, hornblende, or pyroxene. It is the coarse-grained equivalent of andesite.
The American Heritage® Science Dictionary
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