Any of various nocturnal,usually arboreal marsupials of the family Didelphidae,especially Didelphis marsupialis of the Western Hemisphere,having a thick coat of hair,a long snout,and a long prehensile tail.

• 负鼠一种夜间行动的杂食性树栖种袋鼠，尤指生长于西半球的负鼠，毛皮粗糙厚实，身体较长且粗，长有缠绕性的长尾