exo-

a combining form meaning “outside,” “outer,” “external,” used in the formation of compound words: exocentric.
Also ex-.

Origin of exo-

< Greek, combining form of éxō outside

Words nearby exo-

exit tax, exitance, exmoor, exmouth, exo, exo-, exoantigen, exobiology, exobiota, exocardia, exocarp

British Dictionary definitions for exo-

exo-

combining form

external, outside, or beyond exobiology; exothermal

Word Origin for exo-

from Greek exō outside

Medical definitions for exo-

exo-

pref.

Outside; external:exoskeleton.

Scientific definitions for exo-

exo-

A prefix that means “outside” or “external,” as in exoskeleton.