• WordNet 3.6
    • n chelicera either of the first pair of fang-like appendages near the mouth of an arachnid; often modified for grasping and piercing
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Webster's Revised Unabridged Dictionary
    • n Chelicera (Zoöl) One of the anterior pair of mouth organs, terminated by a pincherlike claw, in scorpions and allied Arachnida. They are homologous with the falcers of spiders, and probably with the mandibles of insects.
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Century Dictionary and Cyclopedia
    • n chelicera One of the anterior pair of appendages of a scorpion; a short, three-jointed organ ending in a prehensile claw. See cut under scorpion.
    • n chelicera The corresponding organ in a spider, which terminates in a sharp joint folding down on the preceding one like the blade of a pocket-knife on the handle, and having at its extremity the opening of a poison-gland. This gland is not found in the cheliceræ of the scorpions. These organs are supposed by some naturalists to be the homologues of the antennæ of insects, but others believe that they correspond to the mandibles.
    • n chelicera Also in English form chelicere.
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Chambers's Twentieth Century Dictionary
    • n Chelicera kēl-is′er-a a technical term, usually restricted to the biting organs which form the first pair of appendages in spiders, scorpions, and other Arachnida
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Webster's Revised Unabridged Dictionary
NL., fr. Gr. chhlh` claw + ke`ras horn
Chambers's Twentieth Century Dictionary
Gr. chēlē, a crab's claw, keras, horn.


In literature:

The venom of the spider is not a fable; spiders have poison-glands with ducts which open on the tops of the chelicerae.
"Stories of the Universe: Animal Life" by B. Lindsay
Balbiani believes that the segment of the chelicerae is formed later than that of the six succeeding segments.
"The Works of Francis Maitland Balfour, Volume 1" by Francis Maitland Balfour