a combining form meaning “air,” used in the formation of compound words: atmosphere.

Origin of atmo-

< Greek, combining form of atmós vapor, smoke Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for atmo-


combining form

air or vapouratmometer; atmosphere

Word Origin for atmo-

via New Latin from Greek atmos vapour
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for atmo-



Steam; vapor:atmosphere.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.