Ibex \I"bex\, n.; pl. E. Ibexes, L. Ibices. [L., a kind of goat, the chamois.]

(Zo["o]l.) One of several species of wild goats having very large, recurved horns, transversely ridged in front; -- called also steinbok.

Note: The Alpine ibex (Capra ibex) is the best known. The Spanish, or Pyrenean, ibex (C. Hispanica) has smoother and more spreading horns.

Source: Webster's Revised Unabridged Dictionary (1913)