11 letters · 25 points in Scrabble
noun birth defect characterized by the presence of more than the normal number of fingers or toes
originFrom Ancient Greek πολυδάκτυλος (poludáktulos) + -y, from πολυ- (polu-, “many”) + δάκτυλος (dáktulos, “digits”), equivalent to poly- + dactyly or polydactyl + -y.^((Etymology 3))
Etymology from Wiktionary, CC BY-SA 3.0