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]

chelicerate (kɪˈlɪsəˌreɪt)
1.  of, relating to, or belonging to the Chelicerata, a subphylum of arthropods, including arachnids and the horseshoe crab, in which the first pair of limbs are modified as chelicerae
2.  any arthropod belonging to the Chelicerata

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
chelicerate   (kə-lĭs'ər-āt', -ĭt)  Pronunciation Key 
Any of various, mostly terrestrial arthropods of the subphylum Chelicerata, having a body divided into two main parts: a cephalothorax and an abdomen. Chelicerates have specialized feeding appendages (chelicerae) and lack antennae. Chelicerates include the arachnids and merostomes (horseshoe crabs) and are closely related to the extinct trilobites.
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