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

  • adj. Of or relating to soil, especially as it affects living organisms.
  • adj. Influenced by the soil rather than by the climate.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. soil
  • adj. relating to, or determined by, conditions of the soil, especially as it relates to biological systems
  • adj. soil characteristics, such as water content, pH, texture, and nutrient availability, that influence the type and quantity of vegetation in an area

from The Century Dictionary and Cyclopedia

  • Influenced or produced by the soil or its contents; arising from the soil: as, edaphic formations (see formation); edaphic influences.


From Greek edaphos, ground, soil; see sed- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek ἔδαφος (edaphos) +‎ -ic. (Wiktionary)



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  • Related to or caused by soil conditions, as of texture or drainage, rather than by physiographic or climatic factors.

    November 14, 2007