Lexic.us

Definition of Pectoralis major

1. Noun. A skeletal muscle that adducts and rotates the arm.

Medical Definition of Pectoralis major

1. Origin, clavicular part (pars clavicularis), medial half of clavicle; sternocostal part (pars sternocostalis), anterior surface of manubrium and body of sternum and cartilages of first to sixth ribs; abdominal part (pars abdominalis), aponeurosis of external oblique; insertion, crest of greater tubercle of humerus; action, adducts and medially rotates arm; nerve supply, anterior thoracic. Synonym: musculus pectoralis major, greater pectoral muscle. (05 Mar 2000)

Lexicographical Neighbors of Pectoralis Major

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