Webster's English Dictionary

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clavicle

clav.i.cle \'klav-i-k*l\ \kla-'vik-y*-l*r\ n [F clavicule, fr. NL 
   clavicula, fr. L, dim. of L clavis key;]akin to Gk kleid-, kleis key, L 
   claudere to close : a bone of the vertebrate shoulder girdle typically 
   serving to link the s capula and sternum - cla.vic.u.lar aj