perissodactyl
noun
pe·ris·so·dac·tyl pə-ˈri-sə-ˌdak-tᵊl 
: any of an order (Perissodactyla) of nonruminant ungulate mammals (such as a horse, a tapir, or a rhinoceros) that usually have an odd number of toes, molar teeth with transverse ridges on the grinding surface, and the posterior premolars resembling true molars
perissodactyl adjective
Word History
Etymology
New Latin Perissodactyla, from Greek perissos excessive, odd in number + daktylos finger, toe
First Known Use
circa 1852, in the meaning defined above