资料来源 : Webster's Revised Unabridged Dictionary (1913)

Sui generis \Su"i gen"e*ris\ [L.]
   Of his or its own kind.

资料来源 : WordNet®

sui generis
     adj : constituting a class of its own; unique; "a history book sui
           generis"; "sui generis works like Mary Chestnut's Civil
           War diary"