From The Collaborative International Dictionary of English v.0.48:
Maxilliped \Max*il"li*ped\, n. [Maxilla + L. pes, pedis, foot.]
One of the mouth appendages of Crustacea, situated next
behind the maxillae. Crabs have three pairs, but many of the
lower Crustacea have but one pair of them. Called also
jawfoot, and foot jaw.