What are the ancient (obsolete) names of the "book spine"? [closed]

Solution 1:

The English use of 'spine' for that part of a book is modern, only from the early 20th century. OED.com [Note: page might be accessible only from schools or libraries] gives the first use of this sense of 'spine' from 1922:

1922 M. Sᴀᴅʟᴇɪʀ Excurs. in Victorian Bibliogr. 14 Be wary of books in cloth which bear no publisher's imprint on the spine.

Before that, this part of the book was generally known as the 'back' [ibid.]:

The back of a book, that is, the part bearing the title, etc., which is visible when the book is standing on a shelf

back, n.1:

The convex part of a book, opposite to the opening of the leaves.

1863 Bookseller's Catal. Fine copy, calf extra, full gilt backs, marbled edges.

Of course, 'back' is neither ancient nor obsolete, but it may have to do.