n. One of the appendages on the heads of some crustaceans behind the maxillae, used for feeding.
the GNU version of the Collaborative International Dictionary of English
n. 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.
The Century Dictionary and Cyclopedia
n. In Crustacea, a foot-jaw or gnathopodite; one of the several limbs which are so modified as to partake of the characters of both jaw and foot, serving for the purpose of both mastication and locomotion.
Word Usage
"The first thoracic leg is modified into a feeding appendage ( "mouth part"), the maxilliped, while the other seven pairs of thoracic legs are used for movement."