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topsoil

[top-soil] /ˈtɒpˌsɔɪl/
noun
1.
the fertile, upper part of the soil.
verb (used with object)
2.
to cover (land) with topsoil.
Origin
1860-1865
1860-65; top1 + soil1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for top soil

topsoil

/ˈtɒpˌsɔɪl/
noun
1.
the surface layer of soil
verb (transitive)
2.
to spread topsoil on (land)
3.
to remove the topsoil from (land)
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
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Word Origin and History for top soil

topsoil

n.

1836, from top (n.1) + soil (n.).

Online Etymology Dictionary, © 2010 Douglas Harper
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top soil in Science
topsoil
  (tŏp'soil')   
The upper portion of a soil, usually dark colored and rich in organic material. It is more or less equivalent to the upper portion of an A horizon in an ABC soil.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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top soil in Culture

topsoil definition


The thin, rich layer of soil where most nutrients for plants are found.

Note: Most of the land-based biological activity of the Earth takes place here.
Note: The loss of topsoil through erosion is a major agricultural problem.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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