Chian \Chi"an\a. [L. chius, fr. Chios the island Chios, Gr. ?.] Of or pertaining to Chios, an island in the [AE]gean Sea. [1913 Webster] {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}. [1913 Webster]