WordNet: backbone, spine

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"

• hypernym part, portion

• part holonym book, volume

backbone

• (suomi) selkä (synonyymi)

spine

• (suomi) kirjanselkä (synonyymi)