chelicerae (n.) Look up chelicerae at Dictionary.com
1831, plural of Modern Latin chelicera, from Greek khele "crab claw, talon, pincers; cloven hoof of cattle, horse's hoof," metaphorically "surgical forceps, hooked needle, crochet needle, notch of an arrow," a word of uncertain origin with no agreement on ulterior connections. Earlier chelicer (1835), from French chélicère.