atmo-

1.
a combining form meaning “air,” used in the formation of compound words:
atmosphere.
Origin
< Greek, combining form of atmós vapor, smoke
British Dictionary definitions for atmo-

atmo-

combining form
1.
air or vapour: atmometer, atmosphere
Word Origin
via New Latin from Greek atmos vapour
atmo- in Medicine

atmo- pref.
Steam; vapor: atmosphere.