from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A long-tailed, grayish-brown wildcat (Felis yagouaroundi) of tropical America.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A medium-sized Central and South American wild cat, Puma yagouaroundi, Herpailurus yagouaroundi or Felis yagouaroundi.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. long-bodied long-tailed tropical American wildcat
Spanish and Portuguese, from Guarani jaguarundi, yaguarundi, variant of jaguá, yaguar, dog.(American Heritage® Dictionary of the English Language, Fourth Edition)
Ultimately from Guaraní jaguarundy or Old Tupi. (Wiktionary)