
A thumb index, also called a cut-in index or an index notch, is a round cut-out in the pages of
dictionaries
A dictionary is a listing of lexemes from the lexicon of one or more specific languages, often arranged Alphabetical order, alphabetically (or by Semitic root, consonantal root for Semitic languages or radical-and-stroke sorting, radical an ...
,
encyclopedia
An encyclopedia is a reference work or compendium providing summaries of knowledge, either general or special, in a particular field or discipline. Encyclopedias are divided into article (publishing), articles or entries that are arranged Alp ...
s,
Bible
The Bible is a collection of religious texts that are central to Christianity and Judaism, and esteemed in other Abrahamic religions such as Islam. The Bible is an anthology (a compilation of texts of a variety of forms) originally writt ...
s and other large
religious books, and various sectioned, often
alphabetic,
reference work
A reference work is a document, such as a Academic publishing#Scholarly paper, paper, book or periodical literature, periodical (or their electronic publishing, electronic equivalents), to which one can refer for information. The information ...
s, used to locate entries starting at a particular
letter or section. The individual notches are called thumb cuts.
Several ways to achieve this indexing effect were invented and patented in the 1970s by Arthur S. Friedman, a printing engineer in New York.
See also
*
Index (publishing)
An index (: usually indexes, more rarely indices) is a list of words or phrases ('headings') and associated pointers ('locators') to where useful material relating to that heading can be found in a document or collection of documents. Examples ar ...
References
Index (publishing)
Book design
{{Publish-stub