octāvārĭus

a, um, adj.

id.

I. of or belonging to the eighth part (post-class.): vectigal, Cod. Just. 7, 4, 65.—
II. Subst.: octāvārĭus, ĭi, m., a receiver of this tax: octavarii vectigal accipiant, Cod. Th. 4, 12, 8; cf. octavus, II. B.
Lewis & Short
A Latin Dictionary, 1879
An open-access project