(as two words) A curly tail (of a dog).

a (dog's or horse's) tail resembling a whip (see also whiptail, n.).

a dog's tail which is twisted or screw-shaped, often as a result of deliberate inbreeding.

In form ring tail. A dog's tail which is curled upwards so as to form nearly a complete circle.

A tendon in a dog's tail, often cut or pulled out when the tail is being docked.

a dog's tail resembling that of an otter.