follow Dictionary.com

Dictionary.com's Word of the Year is...

cordierite

[kawr-dee-uh-rahyt] /ˈkɔr di əˌraɪt/
noun
1.
a strongly dichroic blue mineral consisting of a silicate of magnesium, aluminum, and iron: common in metamorphic rocks.
Also called dichroite, iolite.
Origin
1805-1815
1805-15; named after Pierre L. A. Cordier (1777-1861), French geologist; see -ite1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
Examples from the web for cordierite
  • Red mudstone is typically altered to indurated, bluish-gray hornfels with clots or crystals of tourmaline or cordierite.
  • cordierite and anthophyllite in footwall of metamorphosed deposits, graphitic schist in hanging wall.
British Dictionary definitions for cordierite

cordierite

/ˈkɔːdɪəˌraɪt/
noun
1.
a grey or violet-blue dichroic mineral that consists of magnesium aluminium iron silicate in orthorhombic crystalline form and is found in metamorphic rocks. Formula: (Mg,Fe)2AL4Si5O18.nH2O Also called dichroite, iolite
Word Origin
C19: named after Pierre L. A. Cordier (1777–1861), French geologist who described it
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
Cite This Source
cordierite in Science
cordierite
  (kôr'dē-ə-rīt')   
A light-blue to dark-blue or gray orthorhombic mineral. Cordierite is a silicate of magnesium, aluminum, and sometimes iron, and is found in granites and in metamorphic rocks that form under relatively low-pressure conditions. Chemical formula: (Mg,Fe)2Al4Si5O18.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Encyclopedia Article for cordierite

blue silicate mineral that occurs as crystals or grains in igneous rocks. It typically occurs in thermally altered clay-rich sediments surrounding igneous intrusions and in schists and paragneisses. Precambrian deposits of the Laramie Range, Wyo., U.S., contain more than 500,000 tons of cordierite. Cordierite is sometimes called dichroite because of its marked pleochroism (different coloured light is transmitted in different directions). For chemical formula and detailed physical properties, see silicate mineral (table)

Learn more about cordierite with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source

Word of the Day

Word Value for cordierite

0
14
Scrabble Words With Friends