chelicera
From ZooTerms (Dictionary of Invertebrate Zoology)
chelicera (noun; plural chelicerae; Greek chele, claw; keras, horn): (Arthropoda: Chelicerata) Anterior most pair of appendages, functioning in grasping, holding, tearing, crushing or piercing; pincherlike in scorpions, but modified as poison fangs in spiders and as biting mouth parts of ticks.
