aero \ˈa(ə)(ˌ)rō, ˈe(ə)-, ˈaa(ə)-, ˈāə-, chiefly substand ˈarē(ˌ)ō or ˈerē- or ˈaarē- or ˈārē-\adjective Etymology:aer- : of or relating to aircraft or aeronautics < aero club > < aero engine > : designed for aerial use especially in aerial photography < aero lens >