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Meaning of sui generis*

su•i ge•ne•ris

Pronunciation: (soo'i ge'ne-ris Eng. s&oomacr'ī jen'&schwar-is, s&oomacr'ē), [key]
— Latin. Latin.
  1. of his, her, its, or their own kind; unique.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.