Manx cat

from the GNU version of the Collaborative International Dictionary of English.

• proper noun (Zoöl.) A breed of domestic cats having a rudimentary tail, containing only about three vertebrae. It is believed to have originated on the Isle of Man.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A breed of domestic cat native to the Isle of Man, principally characterized by suppression of the tail, and with a short-haired coat and a medium-sized, rounded, cobby body.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a short-haired tailless breed of cat believed to originate on the Isle of Man