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illuviation

[ih-loo-vee-ey-shuh n] /ɪˌlu viˈeɪ ʃən/
noun
1.
the accumulation in one layer of soil of materials that have been leached out of another layer.
Origin
1925-1930
1925-30; illuvi(al) + -ation
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for illuviation

illuviation

/ɪˌluːvɪˈeɪʃən/
noun
1.
the process by which a material (illuvium), which includes colloids and mineral salts, is washed down from one layer of soil to a lower layer
Derived Forms
illuvial, adjective
Word Origin
C20: from Latin illuviēs dirt, mud, from il- + -luviēs, from lavere to wash
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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illuviation in Science
illuviation
  (ĭ-l'vē-ā'shən)   
The deposition of colloids, soluble salts, and suspended mineral particles in a lower soil horizon through the process of eluviation (downward movement) from an upper soil horizon.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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