Textbook (noun)

1. A book used in the study of a particular subject, especially one for use in schools or colleges.
2. A book that is considered to provide a definitive or authoritative treatment of a subject.
3. A set of written or printed pages bound together and constituting a book.

Origin:

Mid 19th century: from text + book.

Examples:

1. The textbook covered all the major topics in the field of mathematics.
2. This textbook is widely considered to be the standard reference on the subject.
3. The textbook was written by a leading expert in the field.
4. The textbook is used by students in colleges and universities all over the world.
5. The textbook provides a comprehensive overview of the subject and includes numerous examples and illustrations.