noun (plural same)
- a large wild Eurasian ox that was the ancestor of domestic cattle. It was probably exterminated in Britain in the Bronze Age, and the last one was killed in Poland in 1627. Also called urus.
- Bos primigenius, family Bovidae
late 18th century: from German, early variant of Auerochs, from Old High German ūrohso, from ūr (form also found in Old English, of unknown origin) + ohso 'ox'