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latissimus dorsi
[luh-tis-uh-muhs dawr-sahy]
noun
Anatomy.
plural
latissimi dorsia broad, flat muscle on each side of the midback, the action of which draws the arm backward and downward and rotates the front of the arm toward the body.
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Word History and Origins
Origin of latissimus dorsi1
< New Latin: literally, the broadest (muscle) of the back
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