1. A form of life assumed to exist outside the Earth or its atmosphere
   - extraterrestrial, alien

Derived forms: extraterrestrial beings

Type of: hypothetical creature

Encyclopedia: Extraterrestrial being

• cadent
• cadential
• cadenza
• cadet
• cadetship
• cadge
• cadger
• cadi
• Cadillac
• Cadiz
• cadmium
• cadmium cell
• cadmium orange
• cadmium sulfide
• cadmium sulphide
• cadmium yellow
• cadmium yellow pale
• Cadmus
• Cadra
• Cadra cautella
• Cadra figulilella
• cadre
• caducean
• caduceus
• caducity