Lewis & Short

marra, ae, f. [etym. unknown], a sort of hoe for tearing up weeds, a weeding-hook, = ligo (post-Aug.).

  1. I. Lit.: tu penitus latis eradere viscera marris Ne dubita, Col. 10, 72; id. 10, 89; Plin. 17, 21, 35, § 159; Juv. 15, 166.
  2. II. Transf., a hook: (Silurus) in Danubio marris extrahitur, Plin. 9, 14, 17, § 45.