Word Study
geochemistry
CIDE DICTIONARY
geochemistry, n. [Gr. ge`a, gh^, the earth + chemistry.].
The study of the chemical composition of, and of actual or possible chemical changes in, the crust of the earth. [Webster 1913 Suppl.]
OXFORD DICTIONARY
geochemistry, n. the chemistry of the earth and its rocks, minerals, etc.
Derivative
geochemical adj. geochemist n.
For further exploring for "geochemistry" in Webster Dictionary Online