pec·to·ral
adjective/ˈpektərəl/
/ˈpektərəl/
(anatomy)- relating to or connected with the chest or breast

enlarge image胸部的;胸的 - pectoral muscles
胸肌 - pectoral fins
胸鳍
Word Originlate Middle English (in the sense ‘breastplate’): from Latin pectorale ‘breastplate’, pectoralis ‘of the breast’, from pectus, pector- ‘breast, chest’. - pectoral muscles