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Glite Dictionary
undersoil

undersoil

6.7
A layer of soil below the topsoil and above the rock under the ground
  • noun
  • /ˈʌndərˌsɔɪl/
  • Specialized
translation icon : subsuelo
  • The gardener carefully examined the undersoil to check for nutrients essential for plant growth.

Examples

  • Beyond and just as striking were the fields torn to pieces by plows, thick deep green grass turned over, exposing the rich red undersoil.

    Fiction book (1997)

  • Farmers often analyze the undersoil to understand the best crops to plant in their fields.

  • The construction workers dug deep to reveal the undersoil, which would support the new foundation.

Synonyms

subsoil
vsundersoil
  • Specialized
1 5.4

A layer of soil under the topsoil and above the rock that has less plant material and more minerals

is the same meaning but appears as the other common word form
sublayer
vsundersoil
1 5.1

A thin part under another surface, for example under paint or soil

is specific to the soil layer between topsoil and bedrock
underlayer
vsundersoil
4.2

A material placed under something else to protect or support it

is a natural soil layer found under topsoil above bedrock

Surface Forms

undersoil singular
undersoils plural

Morphology

undersoil = soil (transparent) = under + soil

The meaning is a straightforward 'under' + 'soil' composition denoting soil beneath the top layer.

Etymology

Undersoil is made of under ('below') and soil ('earth' or 'dirt'), so the word gives a simple image of the earth below the top layer. That's why undersoil means the layer of soil that lies beneath the topsoil and above the rock.