14 letters · 17 points in Scrabble
originEtymology tree Proto-Indo-European *h₂eHs- Proto-Indo-European *-tḗr Proto-Indo-European *h₂stḗr Proto-Hellenic *astḗr Ancient Greek ἀστήρ (astḗr) Ancient Greek ᾰ̓́στρον (ắstron)der. English astro- English biologist English astrobiologist From astro- + biologist.
Etymology from Wiktionary, CC BY-SA 3.0