Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

geo-

prefix
 
 
/dʒiː.əʊ-/ US  /-oʊ-/

Definition

of or relating to the Earth: geophysics geologyThe Earth and outer space - general words
(Definition of geo- prefix from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of geo-