Source : Webster's Revised Unabridged Dictionary (1913)

Paleotherium \Pa`le*o*the"ri*um\, n. [NL., fr. Gr. ? ancient + ?
   beast.] (Paleon.)
   An extinct genus of herbivorous Tertiary mammals, once
   supposed to have resembled the tapir in form, but now known
   to have had a more slender form, with a long neck like that
   of a llama. [Written also {Pal[ae]otherium}.]