trĭbūtārĭus, a, um, adj. [tributum],
of or belonging to tribute : necessitas, of paying tribute , Just. 32, 2, 1: solum, subject to tribute , tributary , Plin. 12, 1, 3, § 6; so, praedia tributaria sunt ea, quae in his provinciis sunt, quae propriae Caesaris esse creduntur (opp. stipendiaria), Gai. Inst. 2, 21: civitates, Just. 1, 7, 2: Thraces Macedonum, Flor. 3, 4, 1: tributarius Gallus quidam, Suet. Aug. 40: causa, concerning tribute , Dig. 49, 14, 46: tabellae, letters of credit , Cic. Verr. 2, 4, 66, § 148.