Lewis & Short

lānĭēnus, a, um, adj. [lanius], of a butcher, butcher’s: tabernae, Varr. ap. Non. 532, 20.
Hence, subst.: lānĭēna, ae, f.

  1. I. A butcher’s stall: per myropolia et lanienas, Plaut. Ep. 2, 2, 15: lanienae et tabernae conjunctae, Liv. 44, 16 fin.
  2. II. A mangling, dissecting, Prud. στεφ. 10, 497: omnique laniena excruciatus, torture, mutilation, Amm. 29, 1, 44.