Undersoil

noun

Definitions

Noun
  1. 1
    The soil underneath the surface / topsoil and above the bedrock.

    "It is a singular fact, that on the two great continents in the northern hemisphere […] we have the zone of perpetually frozen under-soil in a low latitude […]"

  2. 2
    the layer of soil between the topsoil and bedrock wordnet

Etymology

From under- + soil.

Next best steps

Mini challenge

Unscramble this word: undersoil