Source : Webster's Revised Unabridged Dictionary (1913)

Orang-outang \O*rang"-ou*tang`\, n. [Malayan ?rang ?tan, i. e.,
   man of the woods; ?rang man + ?tan a forest, wood, wild,
   savage.] (Zo["o]l.)
   An arboreal anthropoid ape ({Simia satyrus}), which inhabits
   Borneo and Sumatra. Often called simply {orang}. [Written
   also {orang-outan}, {orang-utan}, {ourang-utang}, and
   {oran-utan}.]

   Note: It is over four feet high, when full grown, and has
         very long arms, which reach nearly or quite to the
         ground when the body is erect. Its color is reddish
         brown. In structure, it closely resembles man in many
         respects.