goat antelope

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

• noun Any of various wild ruminant mammals of the family Bovidae, especially those of the subfamily Caprinae that have characteristics of both goats and antelopes, such as the chamois, the serows, and the mountain goat.

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

• noun Any of a group of herbivore mammals, the subfamily Caprinae, that includes domestic sheep and goats.

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

• noun bovid related to goats but having antelope-like features: mountain goats; gorals; serows; chamois; gnu goats