extraterrestrial(originating from outside of the Earth) adjective [UK: ˌek.strə.tə.ˈre.striəl] [US: ˌek.strə.tə.ˈre.striəl]Scientists have differing opinions about the existence of extraterrestrial life. = Gli scienziati hanno opinioni divergenti sull'esistenza di vita extraterrestre.
extraterrestrenoun {mf}
alien [aliens](life form of non-Earth origin) noun [UK: ˈeɪ.liən] [US: ˈeɪ.liən]
extraterrestreadjective {m} {f}
alien(pertaining to extraterrestrial life) adjective [UK: ˈeɪ.liən] [US: ˈeɪ.liən]