sui generis

su·i ge·ne·ris  (s jnr-s, s)

adj.

Being the only example of its kind; unique: "sui generis works like Mary Chesnut's Civil War diary" Linda Orr.

---

[Latin su generis : su, of its own + generis, genitive of genus, kind.]

Thesaurus

Adj.

1.

sui generis - constituting a class of its own; unique; "a history book sui generis"; "sui generis works like Mary Chestnut's Civil War diary" single - existing alone or consisting of one entity or part or aspect or individual; "upon the hill stood a single tower"; "had but a single thought which was to escape"; "a single survivor"; "a single serving"; "a single lens"; "a single thickness"