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 opos·sum /(ə)ˈpɑsəm/
 尾有事R中O的小有袋動物,負鼠

 O·pos·sum n.  Zool. Any American marsupial of the genera Didelphys and Chironectes; called also possum.  The common species of the United States is Didelphys Virginiana.
 Note: ☞ Several related species are found in South America. The water opossum of Brazil (Chironectes variegatus), which has the hind feet, webbed, is provided with a marsupial pouch and with cheek pouches.  It is called also yapock.
 Opossum mouse. Zool. See Flying mouse, under Flying.
 Opossum shrimp Zool., any schizopod crustacean of the genus Mysis and allied genera. See Schizopoda.
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 opossum
      n 1: small furry Australian arboreal marsupials having long
           usually prehensile tails [syn: phalanger, possum]
      2: nocturnal arboreal marsupial having a naked prehensile tail
         found from southern North America to northern South
         America [syn: possum]