11 letters · 22 points in Scrabble
noun the exterior protective or supporting structure or shell of many animals (especially invertebrates) including bony or horny parts such as nails or scales or hoofs
originEtymology tree Proto-Indo-European *h₁éǵʰ Proto-Indo-European *-s Proto-Indo-European *h₁eǵʰs Proto-Hellenic *eks Ancient Greek ἐκ (ek) Ancient Greek ἔξω (éxō)der. English exo- English skeleton English exoskeleton From exo- + skeleton.
Etymology from Wiktionary, CC BY-SA 3.0