harēnārius (aren-), a, um, adj. harena. Prop., of or pertaining to sand: lapis, sandstone (= lapis bibulus of Verg.), Serv. Verg. G. 2, 348.

— Transf., of or pertaining to the amphitheatre: fera, destined for the arena, Arn. 29, 1.

— Hence, subst., harēnārius, i, m. A combatant in the amphitheatre, a gladiator, Dig. 22, 5, 21; 36, 1, 5; Cod. Just. 3, 27, 11; Petr. 126, 6; Inscr. Orell. 4063 (but cf. Orell. ad loc.).

— A teacher of the elements of arithmetic (the figures being drawn in sand), Tert. Pall. 6 (cf. abacus).

— harēnā-ria, ae (sc. fodina; cf.: aeraria, argentaria, etc.), f., a sand-pit, Varr. R. R. 1, 2, 23: in arenarias quasdam extra portam Esquilinam perductus occiditur, Cic. Clu. 13, 37 B. and K.

— harēnārium, ii, n., a sand-pit, Vitr. 2, 4, 2; 6, 11.