- a combining form meaning “the earth,” used in the formation of compound words: geochemistry.
noun plural geos or gios
- (esp in Shetland) a small fjord or gully
- indicating earthgeomorphology
word-forming element meaning “earth,” ultimately from Greek geo-, comb. form of ge “earth” (see Gaia).
- A prefix that means earth, as in geochemistry, the study of the Earth’s chemistry.