Source : Webster's Revised Unabridged Dictionary (1913)

Potto \Pot"to\, n. (Zo["o]l.)
      (a) A nocturnal mammal ({Perodictius potto}) of the Lemur
          family, found in West Africa. It has rudimentary
          forefingers. Called also {aposoro}, and {bush dog}.
      (b) The kinkajou.