pectoral
noun/ˈpektərəl/
/ˈpektərəl/
pectorals
(also informal pecs)
[plural]- the muscles of the chestWord Originlate Middle English (in the sense ‘breastplate’): from Latin pectorale ‘breastplate’, pectoralis ‘of the breast’, from pectus, pector- ‘breast, chest’.
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pectoral