geo-

1.
a combining form meaning “the earth,” used in the formation of compound words:
geochemistry.
Origin
< Greek geō-, combining form of gê the earth
British Dictionary definitions for geo-

geo-

combining form
1.
indicating earth: geomorphology
Word Origin
from Greek, from gē earth
Word Origin and History for geo-

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

geo- in Medicine

geo- or ge-
pref.
Earth: geophagia.

geo- in Science
geo- or ge-  
A prefix that means "earth," as in geochemistry, the study of the Earth's chemistry.