The Collaborative International Dictionary
Bison Europaeus
Aurochs \Au"rochs\ ([add]"r[o^]ks), n. [G. auerochs, OHG. [=u]rohso; [=u]r (cf. AS. [=u]r) + ohso ox, G. ochs. Cf. Owre, Ox.] (Zo["o]l.) The European bison ( Bison bonasus, or Bison Europ[ae]us), 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 C[ae]sar, with which it has often been confused.