The Collaborative International Dictionary of English v.0.48:

Text-book \Text"-book`\, n.
   1. A book with wide spaces between the lines, to give room
      for notes.
      [1913 Webster]

   2. A volume, as of some classical author, on which a teacher
      lectures or comments; hence, any manual of instruction; a
      schoolbook.
      [1913 Webster] Text hand

Moby Thesaurus II by Grady Ward, 1.0:

19 Moby Thesaurus words for "textbook":
   abecedarium, abecedary, alphabet book, battledore, casebook,
   exercise book, gradus, grammar, hornbook, manual,
   manual of instruction, primer, reader, schoolbook, speller,
   spelling book, t, text, workbook