The Collaborative International Dictionary of English v.0.48:

Yacare \Yac"a*re`\ (y[a^]k"[.a]*r[=a]`), n. [See Jacare.]
   (Zool.)
   A South American crocodilian (Jacare sclerops) resembling
   the alligator in size and habits. The eye orbits are
   connected together, and surrounded by prominent bony ridges.
   Called also spectacled alligator, and spectacled cayman.
   [Written also jacare.]
   [1913 Webster]

   Note: The name is also applied to allied species.
         [1913 Webster]