Definitions

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

  • n. The smallest unit or volume of soil that contains all the soil horizons of a particular soil type, usually having a surface area of 10.76 square feet or approximately 1 square meter and extending from the ground surface down to bedrock.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. In soil science, a three-dimensional body of soil with dimensions large enough to permit the study of individual soil horizons.

Etymologies

Greek, soil.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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