[soo
-i ge-ne-ris; Eng. soo-ahy jen-er-is, soo-ee] 
| of his, her, its, or their own kind; unique. |
| su·i ge·ne·ris (sōō'ī' jěn'ər-ĭs, sōō'ē) adj. Being the only example of its kind; unique: "sui generis works like Mary Chesnut's Civil War diary" (Linda Orr). [Latin suī generis : suī, of its own + generis, genitive of genus, kind.] |
A person or thing that is unique, in a class by itself: “She is an original artist; each of her paintings is sui generis.” From Latin, meaning “of its own kind.”