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from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The layer or bed of earth beneath the topsoil.
  • transitive v. To plow or turn up the subsoil of.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The layer of earth that is below the topsoil.

from the GNU version of the Collaborative International Dictionary of English

  • n. The bed, or stratum, of earth which lies immediately beneath the surface soil.
  • transitive v. To turn up the subsoil of.

from The Century Dictionary and Cyclopedia

  • In agriculture, to employ the subsoil-plow upon; plow up so as to cut into the subsoil.
  • n. The under-soil: the bed or stratum of earth or earthy matter which lies immediately under the surface soil, and which is less finely disintegrated and contains less organic matter than that.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the layer of soil between the topsoil and bedrock


sub- +‎ soil (Wiktionary)



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