I.an Oriental aromatic plant: Costus Arabicus, Linn.; Plin. 12, 12, 25, § 41; Ov. M. 10, 308; Hor. C. 3, 1, 44 al.; “freq. used in the preparation of costly unguents,” Plin. 13, 1, 2, § 15 sq.; 13, 1, 2, § 18; “in offerings,” Prop. 4 (5), 6, 5. “for the preservation of fruits,” Col. 12, 20, 5 al.
costum , i, n. (access. form, like the Greek, costŏs , i, f., Luc. 9, 917), = κόστος,