From German Aurochs, an early variant of Auerochse, from Middle High German ūrochse "aurochs" from Old High German ūrohso "aurochs", a compound consisting of ūro "aurochs" (from Proto-Germanic *ūraz, *ūrô (“aurochs”)) + ohso "ox". Akin to Old English ūr "aurochs", Old Norse úrr (“aurochs”), Middle Low German ūrosse "aurochs", Old English oxa "ox". More at ox.
- An extinct European mammal, Bos primigenius, the ancestor of domestic cattle.
- (zoology) The European bison (Bison bonasus, or Europæus).
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