Text-book

1.

(Book written for the teaching of a certain subject) សៀវភៅសិក្សា
Example: A new textbook for geography, The children had textbooks in Cambodia.

1.

A book with wide spaces between the lines, to give room for notes.

2.

A volume, as of some classical author, on which a teacher lectures or comments; hence, any manual of instruction; a schoolbook.