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Definition of 'spine'


  1. the series of vertebrae forming the axis of the skeleton and protecting the spinal cord; "the fall broke his back"
       Synonyms: spinal column vertebral column backbone back rachis
  2. any sharply pointed projection
       Synonyms: spur acantha
  3. a small sharp-pointed tip resembling a spike on a stem or leaf
       Synonyms: thorn prickle pricker sticker spikelet
  4. the part of a book's cover that encloses the inner side of the book's pages and that faces outward when the book is shelved; "the title and author were printed on the spine of the book"
       Synonyms: backbone
  5. a sharp rigid animal process or appendage; as a porcupine quill or a ridge on a bone or a ray of a fish fin

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