#intervertebral_disc__intervertebral_disk  a fibrocartilaginous disc serving as a cushion between all of the vertebrae of the spinal column (except between the first two)
  supertype:  disc__disk__saucer  something with a round shape like a flat circular plate
  part of:  spinal_column__vertebral_column__vertebralcolumn__spine__backbone__back__rachis  the series of vertebrae forming the axis of the skeleton and protecting the spinal cord; "the fall broke his back"
     part of:  axial_skeleton__axialskeleton  the part of the skeleton that includes the skull and spinal column and sternum and ribs
        part of:  endoskeleton  the internal skeleton; bony and cartilaginous structure (especially of vertebrates)

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