Wanderoo \Wan`der*oo"\, n. [Cingalese wanderu a monkey.]

(Zo["o]l.) 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.]

Note: The name is sometimes applied also to other allied species.

Source: Webster's Revised Unabridged Dictionary (1913)