Pronunciation: (vī-kOO'nu, -kyOO'-, vi-, vi-kOO'nyu),[key] —n. 1. a wild South American ruminant, Vicugna vicugna, of the Andes, related to the guanaco but smaller, and yielding a soft, delicate wool: an endangered species, now increasing in numbers.
2. a fabric of this wool or of some substitute, usually twilled and finished with a soft nap.
3. a garment, esp. an overcoat, of vicuna. Also,vi•cu'ña.