Octavo and Textbook

Octavo noun - The size of a book whose pages are made by folding a sheet of paper three times to form eight leaves.

Textbook and octavo are semantically related. in published document topic. In some cases you can use "Textbook" instead a noun "Octavo".

Textbook noun - A book used for instruction in a subject.

Octavo and textbook are semantically related. You can use "Octavo" instead a noun "Textbook".