titanothere

noun

1. any member of the extinct mammalian family Brontotheriidae, large, horned relatives of the horse common in North America and Eurasia from the Eocene to the Oligocene epochs.

noun

1. any of various very large horse-like perissodactyl mammals of the genera Menodus, Brontotherium, etc, that lived in Eocene and Oligocene times in North AmericaSee also chalicothere

1. Any of various extinct herbivorous hoofed mammals of the family Brontotheriidae of the Eocene and Oligocene Epochs. Titanotheres were mostly large animals resembling rhinoceroses and had massive skulls with horns and stout bodies.