τό, cubic measure in Egypt, with side = two royal cubits (in Roman times, three cubits), used with application to earth as a unit of labour, in pl., PLille 1r. 11, Wilcken Chr. 385.8, PPetr. 3 pp. 80, 290, Ostr. Bodl. i 244 (all iii BC), Arch.Pap. 6.132 (i AD), POxy. 669.11 (iii AD); — written ναούια ib. 1053 (vi/vii AD). in sg., tax paid by landholders in lieu of digging so many ναύβια, PTeb. 5.15 (ii BC); ν. κατοίκων, ἐναφεσίων, BGU 662 (ii AD), PTeb. 352 (ii AD). perh. another tax, Ostr. 1396 (i AD), Ostr. Bodl. iii 84 (i AD).