Webster's English Dictionary

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cougar

cou.gar \'ku:-g*r, -.ga:r\ n or cougars also cougar [F couguar, fr. NL 
   cuguacuarana, modif. of Tupi suasuarana, l] pl it., false deer, fr. suasu` 
   deer + rana false : a large powerful tawny brown cat (Felis concolor) 
   formerly widespr ead in the Americas but now extinct in many areas - called 
   also catamount, mountain lion, panther, puma