The Collaborative International Dictionary of English v.0.48:

Ouanderoo \Ouan`der*oo"\ (w[o^]n`d[~e]r*[=oo]"), n. (Zool.)
   The wanderoo.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Wanderoo \Wan`der*oo"\, n. [Cingalese wanderu a monkey.] (Zool.)
   A large monkey (Macacus silenus) native of Malabar. It is
   black, or nearly so, but has a long white or gray beard
   encircling the face. Called also maha, silenus,
   neelbhunder, lion-tailed baboon, and great wanderoo.
   [Written also ouanderoo.]
   [1913 Webster]

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