\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}.]