pectoralis

[ pek-tuh-ral-is, -rey-lis, -rah- ]
/ ˌpɛk təˈræl ɪs, -ˈreɪ lɪs, -ˈrɑ- /

noun, plural pec·to·ral·es [pek-tuh-ral-eez, -rey-leez, -rah-]. /ˌpɛk təˈræl iz, -ˈreɪ liz, -ˈrɑ-/. Anatomy.

either of two muscles on each side of the upper and anterior part of the thorax, the action of the larger (pectoralis major ) assisting in drawing the shoulder forward and rotating the arm inward, and the action of the smaller (pectoralis minor ) assisting in drawing the shoulder downward and forward.

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Origin of pectoralis

<Latin pectorālis;see pectoral
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

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