Aurochs, n. [G. auerochs, OHG. ; (cf. AS. ) + ohso ox, G. ochs. Cf. Owre, Ox.].
The European bison (Bison bonasus, orBison Europæus), once widely distributed, but now nearly extinct, except where protected in the Lithuanian forests, and perhaps in the Caucasus. It is distinct from the Urus of Cæsar, with which it has often been confused. [1913 Webster]
Aurochs, n. (pl. same) an extinct wild ox, Bos primigenius, ancestor of domestic cattle and formerly native to many parts of the world. Also called URUS.