Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The upper layers of a soil profile in which topsoil formation occurs.

from The Century Dictionary.

  • noun In Scots law, ground; a piece of ground.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Within a soil profile, a set of related soil horizons that share the same cycle of pedogenic processes.

Etymologies

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

[Latin, base, ground.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin solum ("base, bottom; soil").

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