Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Either of two broad, flat, triangular muscles with origin from the spinous processes of the lower thoracic and lumbar vertebrae, the sacrum, and the iliac crest, that insert into the humerus and whose action adducts, medially rotates, and extends the arm.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun anatomy Either of the larger, flat, dorso-lateral
muscles on thetrunk ,posterior to the arm, and partly covered by thetrapezius on itsmedian dorsal region.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a broad flat muscle on either side of the back
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
[New Latin lātissimus dorsī : Latin lātissimus, superlative of lātus, wide + Latin dorsī, genitive of dorsum, back.]
from Wiktionary, Creative Commons Attribution/Share-Alike License
From Latin lātissimus ("widest, broadest"), superlative oflātus ("wide, broad"), + dorsī, genitive of dorsum ("the back").
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