The Collaborative International Dictionary of English v.0.48:

Hylobate \Hy"lo*bate\, n. [Gr. ? one that walks or inhabits the
   woods: ? a wood + ? to go.] (Zool.)
   Any species of the genus Hylobates; a gibbon, or long-armed
   ape. See Gibbon.
   [1913 Webster]