Longman Dictionary of Contemporary English
aero-
prefix
EXAMPLES FROM OTHER ENTRIES
▪ aeronautics
The Collaborative International Dictionary
Aero-
Aero- \A"["e]r*o-\ [Gr. ?, ?, air.] The combining form of the Greek word meaning air.
Douglas Harper's Etymology Dictionary
aero-
word-forming element meaning "air, atmosphere; aircraft; gases," from Greek aero-, comb. form of aer (genitive aeros) "air, lower atmosphere" (see air (n.1)).
Wiktionary
aero-
pre. (non-gloss definition: Denoting a connection to air or aircraft.)