This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. An extinct wild ox (Bos primigenius) of Europe, northern Africa, and western Asia, believed to be the ancestor of domestic cattle. Also called aurochs.

n. The aurochs.

n. A very large, powerful, and savage extinct bovine animal (Bos urus or Bos primigenius) anciently abundant in Europe. It appears to have still existed in the time of Julius Cæsar. It had very large horns, and was hardly capable of domestication. Called also, ur, ure, and tur.

n. A kind of wild bull described by Cæsar; the mountain-bull, which ran wild in Gaul at the period of the Roman invasion, but has long been extinct.

n. [capitalized] A genus of Bovidæ, including the aurochs and extinct bisons: therefore equivalent to Bison as now employed.

n. A kind of fossil ox from Eschscholtz Bay, Alaska.

n. large recently extinct long-horned European wild ox; considered one of the ancestors of domestic cattle

"_ The urus, which is the representative of the wild cattle of this period, is the ancestor of our long-horned cattle, and should be distinguished from the short-horned cattle that appear in western Europe in the prehistoric period in a domesticated state."

wild ox    ox   

Ur    ure    tur