Lewis & Short

lĕpŏrārĭus, a, um, adj. [lepus], of or belonging to a hare, hare-: lageos (vitis) est, quae Latine leporaria dicitur: nam λαγὼς lepus, Serv. Verg. G. 2, 93.
Subst.: lĕpŏ-rārĭum, ii, n., a place where hares and other wild animals are kept; a preserve, warren, cover, Varr. R. R. 3, 3; 3, 12; Gell. 2, 20, 4.