noun, plural chelicerae [kuh-lis-uh-ree] .
one member of the first pair of usually pincerlike appendages of spiders and other arachnids.
Compare pedipalp.

1825–35; < Neo-Latin, equivalent to cheli- cheli- + Greek kér(as) horn + Latin -a feminine noun ending

cheliceral, adjective
chelicerate [kuh-lis-uh-reyt, -er-it] , adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
chelicera (kɪˈlɪsərə)
n , pl -erae
one of a pair of appendages on the head of spiders and other arachnids: often modified as food-catching claws
[C19: from New Latin, from French chélicère, from chél- see chela1 + -cère from Greek keras horn]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

pl. of Mod.L. chelicera, from Gk. khele "claw" (see chelate). Earlier chelicer (1835), from Fr. chélicère.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences for chelicerae
The first pair of appendages, the chelicerae, serve in feeding and defense.
Prey is located with the pedipalps and killed and cut into pieces by the chelicerae.
The males, being much smaller, inject far less venom with smaller chelicerae.
The first two segments of the prosoma bear no appendages the third bears the chelicerae.
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