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spinal column

n :  the articulated series of vertebrae connected by ligaments and separated by more or less elastic intervertebral fibrocartilages that in nearly all vertebrates forms the supporting axis of the body and a protection for the spinal cord and that extends from the hind end of the skull through the median dorsal part of the body to the coccyx or end of the tail - called also backbone , pine , ertebral column  .
 
 

 
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