English
aerogen
From aero- + -gen.
Proto-Indo-European *h₂ews- ‘dawn’
Proto-Indo-European *h₂ewsér ‘in the direction of dawn, east’
Proto-Hellenic *auhḗr ‘morning mist’
Ancient Greek ᾱ̓ήρ ‘mist’
English aero
Today it means
noun Any noble gas.
Language periods are conventional ranges, not dates for this word.
Etymograph / aerogen