/tuy tan"euh thear', tuyt"n euh-/ , n.
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.
[ Titanotherium genus name, equiv. to Gk Titán TITAN + -o- -O- + theríon -THERE ]