LSJ
ἡ, Cimolus, an island in the Cyclades; — Adj. Κιμώλιος, α, ον, ἰσχάδες Amphis 40; Κιμωλία (with or without γῆ), ἡ, Cimolian earth, a white clay, like fuller΄s earth, used in baths and barbers’ shops, and in medicine, Ar. Ra. 713 (lyr.), Str. 10.5.1, Dsc. 5.156.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)