Lewis & Short

ostrīnus, a, um, adj. [ostrum], purple (ante-class. and poet.): supparum, Varr. ap. Non. 549, 12: ricula, Turp. ib.: colores, Prop. 4, 12, 7: torus, id. 1, 14, 20: tunica, id. 3, 27, 26.