subaerial /sub-ā(-ē)ˈri-əl/

1. In the open air
2. Occurring on the land at or near the earth's surface, as opposed to underground or under water

subāēˈrially adverb

• airscrew
• airscrews
• air-sea rescue
• airshaft
• airshafts
• airship
• airships
• air shot
• air shots
• airshow
• air shower
• airshows
• airsick
• air-sickness
• airside
• air sign
• air signs
• airspace
• airspaces
• airspeed
• airspeeds
• air-splint
• air-splints
• air station
• air stations