exo-

combining form
variants: or

ex-

Definition of exo-

  1. 1 :  outside exogamy :  outer exoskeleton — compare ect-, end-

  2. 2 :  turning out exoergic

Origin and Etymology of exo-

Greek exō out, outside, from ex out of — more at ex-


Medical Dictionary

exo-

combining form
variants: or

ex-

Medical Definition of exo-

  1. 1:  outside :  outer exoenzyme exoskeleton—compare ecto-, end- 1

  2. 2:  turning out exothermic


Seen and Heard

What made you want to look up exo-? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

marked by lack of plan or order

Get Word of the Day daily email!

Test Your Vocabulary

The Emoji Quiz

  • emoji-the-quiz
  • What phase of the moon is this: 🌖 ?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!