1. Beneath the sky; in the open air; specifically: (geology) taking place on the earth's surface, as opposed to subaqueous

Encyclopedia: Subaerial

• rugger
• rugose
• rugosity
• rugous
• rugulah
• Ruholla Khomeini
• Ruhr
• Ruhr River
• Ruhr Valley
• ruin
• ruinate
• ruination
• ruined
• ruiner
• ruining
• ruinous
• ruinously
• rule
• rule book
• rule in
• rule of cy pres
• rule of evidence
• rule of grammar
• rule of law
• rule of morphology