English
aerovac
From aero- + evac.
Proto-Indo-European *h₂ews- ‘dawn’
Proto-Indo-European *h₂ewsér ‘in the direction of dawn, east’
Proto-Hellenic *auhḗr ‘morning mist’
Ancient Greek ἀήρ ‘air’
Ancient Greek ἀέρος
English aero-
Today it means
noun Aeromedical evacuation.
Language periods are conventional ranges, not dates for this word.
Etymograph / aerovac