Source : Webster's Revised Unabridged Dictionary (1913)

Phalanger \Pha*lan"ger\, n. [Cf. F. phalanger. See {Phalanx}.]
   (Zo["o]l.)
   Any marsupial belonging to {Phalangista}, {Cuscus},
   {Petaurus}, and other genera of the family
   {Phalangistid[ae]}. They are arboreal, and the species of
   {Petaurus} are furnished with lateral parachutes. See {Flying
   phalanger}, under {Flying}.

Source : WordNet®

phalanger
     n : small furry Australian arboreal marsupials having long
         usually prehensile tails [syn: {opossum}, {possum}]