16 letters · 23 points in Scrabble
noun a form of life assumed to exist outside the Earth or its atmosphere
adjective originating or located or occurring outside Earth or its atmosphere
originEtymology tree Proto-Indo-European *h₁éǵʰ Proto-Indo-European *-s Proto-Indo-European *h₁éǵʰs Proto-Indo-European *-teros Proto-Indo-European *h₁eǵʰsteros Proto-Italic *eksteros Latin exter Latin extrā English extra- English terrestrial English extraterrestrial From extra- + terrestrial.
Etymology from Wiktionary, CC BY-SA 3.0