8 letters · 15 points in Scrabble
noun earliest horse; extinct primitive dog-sized four-toed Eocene animal
originOriginally a genus name, Eohippus, formed in New Latin, from Ancient Greek ἠώς (ēṓs, “dawn”) + ἵππος (híppos, “horse”). By surface analysis, eo- + Latin hippus.
Etymology from Wiktionary, CC BY-SA 3.0