Text-book n.
  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.
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  textbook
       adj : according to or characteristic of a casebook or textbook;
             typical; "a casebook schizophrenic"; "a textbook
             example" [syn: casebook]
       n : a book prepared for use in schools or colleges; "his
           economics textbook is in its tenth edition"; "the
           professor wrote the text that he assigned students to
           buy" [syn: text, text edition, schoolbook, school
           text] [ant: trade book]