I. Prop., of or pertaining to sand: lapis, sandstone (= lapis bibulus of Verg.), Serv. Verg. G. 2, 348.—
II. Transf., of or pertaining to the amphitheatre: “fera,” destined for the arena, Arn. 29, 1.—
III. Hence, subst.,
A. hărēnārĭus , i, m.
1. 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.).—
2. A teacher of the elements of arithmetic (the figures being drawn in sand), Tert. Pall. 6 (cf. abacus).—