The Collaborative International Dictionary
geochemistry \ge`o*chem"is*try\ (j[=e]`[-o]*k[e^]m"[i^]s*tr[y^]), 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. -- Ge`o*chem"ic*al, a. -- Ge`o*chem"ist, n.
Wiktionary
n. (context chemistry geology English) A chemist or geologist who specializes in geochemistry
Usage examples of "geochemist".
He was not geochemist enough to guess at the reactions which might have formed what they actually found, and was too sensible to worry about it before actual analyses had been made.
Ask a pair of geochemists how something like this works, and they will start talking about isotopic abundances and ionization levels with an enthusiasm that is more endearing than fathomable.
This is where the geochemists come in, for the isotopes accumulate at different rates depending on how much oxygen or carbon dioxide is in the atmosphere at the time of their creation.
One of the geochemists opened his pants and demonstrated how, in drinking the water, they now pissed streams of faint light.
Nebula right here at the time when, according to our best geophysicists and geochemists, old Earth was being born.
Fuchs, once a planetary geochemist, used Nautilus's electron guns to charge up his craft's skin, then covered the spacecraft with pebbles and dust from a loosely aggregated chondritic asteroid.
Like photogeologists, for instance, who work from photographs, and petrologists, who treat their rocks like lab specimens, and geochemists and geophysicists.