Also found in: Thesaurus, Acronyms, Encyclopedia, Wikipedia.
Related to diorite: gabbro, andesite, Quartz diorite


Any of various dark, granite-textured, crystalline rocks rich in plagioclase feldspar and having little quartz.

[French, from Greek diorizein, to distinguish : dia-, apart, between; see dia- + horizein, to divide, limit; see horizon.]

di′o·rit′ic (-rĭt′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Minerals) a dark coarse-grained igneous plutonic rock consisting of plagioclase feldspar and ferromagnesian minerals such as hornblende
[C19: from French, from Greek diorizein to distinguish (from dia- apart + horizein to define) + -ite1]
dioritic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈdaɪ əˌraɪt)

a granular igneous rock consisting essentially of plagioclase feldspar and hornblende.
[1820–30; < French < Greek dior(ízein) to distinguish]
di`o•rit′ic (-ˈrɪt ɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


A coarse-textured igneous rock, mainly comprising feldspar and pyroxene.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.diorite - a granular crystalline intrusive rockdiorite - a granular crystalline intrusive rock
igneous rock - rock formed by the solidification of molten magma
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The exploration work identified chalcopyrite-magnetite mineralisation hosted by potassic altered diorite.
Mineralisation consists of native gold associated with pyrite, chalcopyrite and sphalerite disseminated in quartz veins within a linear body of diorite within volcanic rocks.
The Mirkani granitoids, western part of KB, consist of diorite, granodiorite and granitic units of calc-alkaline nature which yield LA-ICP-MS U-Pb zircon ages of 120-121Ma (work in progress; Fig.
But the police themselves say they too have stepped up patrols, as part of an ongoing sting, code-named Operation Diorite.
musical all vibrato doer, dirt, dire, diorite, dint, dinner, tremolo, Staccato, t.
According to a geologist who examined a photograph of the Luzon Datum, it is diorite, an igneous rock characterized by its 'salt and pepper' look and which usually hosts copper mineralization.
Three main geological units lie in the area of El Vapor district, (Fig 1): (i) San Lucas quartz-feldspathic gneisses (Gonzalez, 2001), which contains lenses of amphibolite and marble and are Proterozoic (Feininger et al., 1972); (ii) Segovia batholith of Jurassic age (160 [+ or -] 7 M.a., K/Ar in hornblende, Feininger et al., 1972), consists of a diorite with textural and compositional variations of quartz diorite and locally hornblende gabbro; and finally, (iii) Segovia sedimentary rocks in the west of Segovia mainly composed of black shales interbedded with siltstones, sandstones and intraformational conglomerates, which in the north of the area have been dated between the upper Aptian and the lower Albian (Feininger et al., 1972) based on macro-fauna dating.
At depth in the BEP, large clasts of potassic altered (biotite, potassic feldspar and magnetite) diorite porphyry with intense stockwork chalcopyrite-bornite mineralisation occur within a diatreme breccia and are interpreted to have been transported from a high-grade potassic core at depth.
Darnell und Colleen Manassa behandeln "A Trustworthy Sealbearer on a Mission: The Monuments of Sabastet from the Khephren Diorite Quarries." Nach einer generellen Einfuhrung uber das Gebiet der Minen von Chephren am Gabal al-Asr, etwa 80 Kilometer nordwestlich von Tusha gelegen, werden die vier Hauptobjekte des Beitrags vorgestellt, die mit einem einzigen Schrein in Verbindung stehen und durch einen Mann namens S3-B3st.t gestiftet wurden.
Built in 1186 by Acami Abubakiroglu Nakhchivaniabove a vaulted crypt itsits on a shallow base made of large blocks of red diorite. A flat roof raised on a tapering, decagonal drum covers the slightly pointed inner dome.
Intrusive ultramafic rocks and quartz diorite displace these basement metamorphic rocks in some places.
2120 BC (neo-Sumerian period), Tello, ancient Girsu (Iraq), diorite, ht 107cm.