The Collaborative International Dictionary of English v.0.48:

Kinkajou \Kin"ka*jou`\, n. [F. kinkajou, quincajou, from the
   native American name.] (Zool.)
   A nocturnal carnivorous mammal (Cercoleptes caudivolvulus)
   of South America, about as large as a full-grown cat. It has
   a prehensile tail and lives in trees. It is the only
   representative of a distinct family (Cercoleptid[ae])
   allied to the raccoons. Called also potto, and honey
   bear.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Potto \Pot"to\, n. (Zool.)
      (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.
          [1913 Webster]

WordNet (r) 3.0 (2006):

potto
    n 1: arboreal fruit-eating mammal of tropical America with a
         long prehensile tail [syn: kinkajou, honey bear,
         potto, Potos flavus, Potos caudivolvulus]
    2: a kind of lemur [syn: potto, kinkajou, Perodicticus
       potto]