exhalation
Concise Oxford English Dictionary © 2008 Oxford University Press:
exhale /ɪksˈheɪl, ɛks-/
▶verb
- 1 breathe out.
- 2 give off (vapour or fumes).
– derivatives
exhalable adjective,
exhalation noun.
exhalable adjective,
exhalation noun.
– origin ME: from OFr. exhaler, from L. exhalare, from ex- ‘out’ + halare ‘breathe’.
'exhalation' also found in these Oxford entries:

