RELATED WORDS
PARAPHRASING
backbone; a sharp, pointed part on some plants and animals; the part of a book's cover, usually with the book's title on it, covering the edge where the pages are joined
backbone
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Cases of word usage
1) the last bone at the bottom of the spine (coccyx)
2) a person unable to walk or move properly because of injury or weakness in the spine or legs (cripple)
3) a large wing or tail feather; a long spine of a porcupine (quill)
4) of the spine (spinal)
