cosmo-

cosmo-

(word root) universe
Examples of words with the root cosmo-: cosmonaut
Abused, Confused, & Misused Words by Mary Embree Copyright © 2007, 2013 by Mary Embree

cosmo-

or cosm-
pref.
Universe; world: cosmology.

[From Greek kosmos, order, universe.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

cosmo-

or before a vowel

cosm-

combining form
indicating the world or universe: cosmology; cosmonaut; cosmography.
[from Greek: cosmos]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

cosmo-

a combining form meaning “world,” “universe” (cosmography); in contemporary usage, sometimes representing Russian kosmo-, it may mean “outer space,” “space travel,” or “cosmic ray” (cosmonaut).
Compare astro-.
[< Greek kosmo-, comb. form of kósmos cosmos]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.