geo-


  1. a combining form meaning “the earth,” used in the formation of compound words: geochemistry.

combining form

  1. indicating earthgeomorphology

word-forming element meaning “earth,” ultimately from Greek geo-, comb. form of ge “earth” (see Gaia).

pref.

  1. Earth:geophagia.

  1. A prefix that means “earth,” as in geochemistry, the study of the Earth’s chemistry.

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