Definition, Meaning & Synonyms

exo

Prefix
/ˈɛk.səʊ/
Definition
A prefix meaning ‘outside’ or ‘external’.
Examples
  • Exoplanet: A planet located outside our solar system.
  • Exoskeleton: An external skeleton that supports and protects an animal’s body.
  • Exothermic: A chemical reaction that releases energy in the form of heat.
Meaning
Used in scientific terms to denote something that is external or originates from outside a certain area or structure.
Synonyms
  • Exterior
  • External
  • Outer