Rhodesian ridgeback

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A dog of a large breed developed in Africa for hunting, having short tan to reddish-brown hair that forms a ridge along the back.

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

• noun a powerful short-haired African hunting dog having a crest of reversed hair along the spine