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  1. the science dealing with the chemical changes in and the composition of the earth's crust.

Origin of geochemistry

First recorded in 1900–05; geo- + chemistry
Related formsge·o·chem·i·cal [jee-oh-kem-i-kuh l] /ˌdʒi oʊˈkɛm ɪ kəl/, adjectivege·o·chem·i·cal·ly, adverbge·o·chem·ist, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for geochemical


  1. the geology and chemistry concerned with the chemical composition of, and chemical reactions taking place within, the earth's crust
Derived Formsgeochemical (ˌdʒiːəʊˈkɛmɪkəl), adjectivegeochemist, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

geochemical in Science


  1. The scientific study of the chemical composition of the Earth or other celestial body and of the reactions that control the distribution of chemical elements in its minerals, rocks, soil, waters, and atmosphere.
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