exo-
American-
a combining form meaning “outside,” “outer,” “external,” used in the formation of compound words.
exocentric.
exo
1
British
/ ˈɛksəʊ /
adjective
-
an informal word for excellent
exo-
2
British
combining form
-
external, outside, or beyond
exobiology
exothermal
exo–
Scientific
-
A prefix that means “outside” or “external,” as in exoskeleton.
Etymology
Origin of exo-
< Greek, combining form of éxō outside
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.