Source : Webster's Revised Unabridged Dictionary (1913)

Titanotherium \Ti`tan*o*the"ri*um\, n. [NL., fr. Gr. ? a Titan +
   ?, dim. of ? a beast.] (Paleon.)
   A large American Miocene mammal, allied to the rhinoceros,
   and more nearly to the extinct Brontotherium.