Definition of Spine

Noun

• a sharp rigid animal process or appendage
  as a porcupine quill or a ridge on a bone or a ray of a fish fin
  
• 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"
  backbone
• a small sharp-pointed tip resembling a spike on a stem or leaf
  thorn prickle pricker sticker spikelet
• any sharply pointed projection
  spur acantha
• the series of vertebrae forming the axis of the skeleton and protecting the spinal cord
  "the fall broke his back"
  - spinal column - vertebral column backbone back rachis

• Scrabble® score of the spine (7)
• Word Chums® score of the spine (9)
• Words With Friends® score of the spine (9)