12 letters · 19 points in Scrabble
noun either one of a pair of compounds (crystals or molecules) that are mirror images on each other but are not identical
originFrom Ancient Greek ἐναντίος (enantíos, “opposite”) + μορφή (morphḗ, “form”). By surface analysis, enantio- + -morph.
Etymology from Wiktionary, CC BY-SA 3.0