Backbone, backbone - the Portion of a book's cover that encloses the inner aspect from the book's web pages Which faces outward if the book is shelved; "the title and writer were printed over the backbone from the book" [14] The Rule of Saint Benedict (Ch. XLVIII), which put aside https://www.youtube.com/channel/UCP9Gw00CldPUmiu43y7fdWw