octāvārius, a, um, adj. id., of or belonging to the eighth part (post-class.): vectigal, a tax of the eighth part, Cod. Just. 7, 4, 65.
— Subst.: octāvārius, ii, m., a receiver of this tax: octavarii vectigal accipiant, Cod. Th. 4, 12, 8; cf. octavus, II. B.