Chi"an (?) a. [L. chius, fr. Chios the island Chios, Gr. ?.] Of or pertaining to Chios, an island in the Ægean Sea.

Chian earth, a dense, compact kind of earth, from Chios, used anciently as an astringent and a cosmetic. -- Chian turpentine, a fragrant, almost transparent turpentine, obtained from the Pistacia Terebinthus.