Definition of "auroch"

The truth is, he says, that the first of these skulls is that of an auroch, with no difference which can reasonably be considered as specific; and the second belongs, he conceives, simply to the species of our domestic ox, of which it has all the characters.

1814, James Parkinson, Organic Remains of a Former World, page 322

Cuvier thus carefully marks the distinctions between the species: “The forehead of the ox is flat and a little concave; —that of the auroch protuberant, although less so than the buffalo's; […]

1839, Henry Woods, Description of the Fossil Skull of an Ox, page 23

The next time they darted in at the auroch, Marra nipped at its ear and Pell actually took its jowls in his mouth.

2012, Dorothy Hearst, Secrets of the Wolves, page 286