thumb index


Information & Library Science

  • noun a method of indexing used especially for dictionaries and diaries, where rounded holes are cut into the foredge of a book, allowing a thumb to be placed in the hole and the book to be opened at the correct page quickly
  • verb
    (written as thumb-index)
    to provide a book with a thumb index

Media Studies

  • noun a series of labelled indentations cut into the pages of a book down the edge opposite the binding to allow a particular section to be located quickly