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clavicularium

noun
cla·​vic·​u·​lar·​i·​um | \kləˌvikyəˈla(a)rēəm, kla-\
plural clavicularia\ -​rēə \

Definition of clavicularium 

: the epiplastron of turtles regarded as representing the clavicle

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History and Etymology for clavicularium

New Latin, from clavicula clavicle + -arium

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