Webster's Revised Unabridged Dictionary · 1913

Paleotherium

Paleotherium (pā`le*o*thē"ri*um) , noun

[New Latin, from Greek palaio`s ancient + qhri`on beast.]

(Paleontology) 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.