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pectoral muscle
pec·to·ral mus·cle (plural pec·to·ral mus·cles)


noun 
Definition:
 
chest muscle: any of four flat muscles, two on each side of the front of the chest, that help to move the upper arm and shoulder
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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