spine
spine
noun
The narrow back edge of a book where the pages are bound.
"The book's title was printed on its spine."
noun
The column of vertebrae supporting the body, protecting the spinal cord.
"He injured his spine playing rugby."
noun
Strength of character or courage to stand up for oneself.
"She needs to grow a spine and object."
Thesaurus
Synonyms: sticker, pricker, thorn, prickle, spikelet, backbone, vertebral column, rachis, spinal column, back, spur, acantha