illuviation

[ih-loo-vee-ey-shuhn]

il·lu·vi·a·tion

[ih-loo-vee-ey-shuhn]
noun
the accumulation in one layer of soil of materials that have been leached out of another layer.

Origin:
1925–30; illuvi(al) + -ation
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Illuviation has a plethora of syllables.
So is supercalifragilisticexpialidocious. Does it mean:
(used as a nonsense word by children to express approval or to represent the longest word in English.)
a white, crystalline, water-insoluble, powerful high explosive, C3H6N6O6, used chiefly in bombs and shells.
Collins
World English Dictionary
illuviation (ɪˌluːvɪˈeɪʃən)
 
n
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
 
[C20: from Latin illuviēs dirt, mud, from il- + -luviēs, from lavere to wash]
 
il'luvial
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage
Science Dictionary
illuviation   (ĭ-l'vē-ā'shən)  Pronunciation Key 
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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