return air
noun
1 Mining air contaminated with coal dust and gas which is pumped out of a mine.
2Air which is returned from a heated or refrigerated space for processing and recirculation.
Origin
Early 19th century; earliest use found in The Edinburgh Encyclopaedia.
- tropocollagen
- tropologic
- tropological
- tropologically
- tropologise
- tropologize
- tropology
- tropolone
- tropometer
- tropomyosin
- tropone
- troponin
- tropopause
- tropophilous
- tropophyte
- tropophytic
- troposcatter
- troposphere
- tropospheric
- tropospheric scatter
- tropostereoscope
- tropotactic
- tropotactically
- tropotaxis
- troppo