ˌaŋkəˈthirēəm noun
Usage: capitalized
Etymology: New Latin, from Greek anchi near + New Latin -therium
: a genus of extinct Miocene and Pliocene perissodactyl mammals related to the modern horse from which they differ in dentition and especially in the limbs, having a complete ulna and fibula and three functional toes of which the middle one is much the largest