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

  • noun The branch of geology that deals with the occurrence, distribution, and effect of groundwater.

from The Century Dictionary.

  • noun The geology of water; that part of geological science which has to do with the relations of water standing or flowing beneath the surface of the earth.

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

  • noun The geology of groundwater, especially concerning the physical, biological and chemical properties of its occurrence and movement.


from Wiktionary, Creative Commons Attribution/Share-Alike License

hydro- +‎ geology


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