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Any of various arthropods of the subphylum Chelicerata, having mouthparts with chelicerae, a body composed of two main parts, and no antennae, and including the arachnids and the horseshoe crabs.
[From New Latin Chēlicerāta, subphylum name, from chēlicera, chelicera; see chelicera.]
(Animals) of, relating to, or belonging to the Chelicerata, a subphylum of arthropods, including arachnids and the horseshoe crab, in which the first pair of limbs are modified as chelicerae
(Animals) any arthropod belonging to the Chelicerata