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subsoil

[ suhb-soil ]
/ ˈsʌbˌsɔɪl /
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noun
the bed or stratum of earth or earthy material immediately under the surface soil.
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Also called undersoil.

Origin of subsoil

First recorded in 1790–1800; sub- + soil1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use subsoil in a sentence

British Dictionary definitions for subsoil

subsoil
/ (ˈsʌbˌsɔɪl) /

noun
  1. Also called: undersoil the layer of soil beneath the surface soil and overlying the bedrock
  2. (as modifier)a subsoil plough
verb
(tr) to plough (land) to a depth below the normal ploughing level and so break up the subsoil

Derived forms of subsoil

subsoiler, noun
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 subsoil

subsoil
[ sŭbsoil′ ]

In an ABC soil, the B horizon. The term was formerly used to mean the layer of earth below the humus or surface soil.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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