Dictionary
cosmo-
a combining form meaning “world,” “universe,” used in the formation of compound words:
cosmography; in contemporary usage, sometimes representing Russian
kosmo-, it may mean “outer space,” “space travel,” or “cosmic ray”:
cosmonaut. Also, esp. before a vowel,cosm-.Cf.
astro-. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.