n. The pair of pincers or nippers, or the so-called claw, which terminates some of the limbs of most Crustacea, as crabs and lobsters, formed by an enlarged propodite bearing a movably apposed dactylopodite; the last and penultimate segments of a chelate limb or cheliped so modified as to constitute a prehensile organ like a pair of pincers.n. The similar nipper- or pincer-like claw terminating the chelicera of an arachnidan, as a scorpion. In these two senses also chele.n. A genus of cyprinoid fishes.n. See cheela.n. In sponge-spicules, a microsclere consisting of a more or loss curved shaft bearing at each end a variable number of recurved processes.