Definition of "arctos"

A species name descriptor.

1. A descriptor related to bears, for bears and bear-like species

   1. Ellipsis of Ursus arctos. (brown bear)  examples

2. A descriptor for species related to the northern polar region, from association with Ursa Major, Ursa Minor and its Polaris (the North Star).

   1. Ellipsis of Canis lupus arctos. (Arctic wolf)  examples