maxilliped
Max*il"li*ped, n. Etym: [Maxilla + L. pes, pedis, foot.] (Zoöl.) Defn: One of the mouth appendages of Crustacea, situated next behind the maxillæ. Crabs have three pairs, but many of the lower Crustacea have but one pair of them. Called also jawfoot, and foot jaw.