[ key-uh-luh-nahyt ]
/ ˈkeɪ ə ləˌnaɪt /
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a very common mineral, hydrated aluminum disilicate, Al2Si2O5(OH)4, formed by the alteration of other minerals, especially feldspar: the most common constituent of kaolin.



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Origin of kaolinite

First recorded in 1865–70; kaolin + -ite1

Words nearby kaolinite

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for kaolinite

/ (ˈkeɪəlɪˌnaɪt) /


a white or grey clay mineral consisting of hydrated aluminium silicate in triclinic crystalline form, the main constituent of kaolin. Formula: Al 2 Si 2 O 5 (OH) 4
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 kaolinite

[ kāə-lĭ-nīt′ ]

A soft, white triclinic mineral occurring in friable masses. Kaolinite forms as the result of the hydrothermal alteration or weathering of feldspar. It is used in the ceramic industry. Chemical formula : Al2Si2O5(OH)4.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.