thumb index

Some books such as Bibles or dictionaries may have a thumb index to help find material quickly.

Do I have a thumb index?

It is available in two versions: with a thumb index in the $19.95 edition and with a regular index in the $16.95 edition.

The edge index is not to be confused with the thumb index, but nevertheless is often also called thumb index or chapter thumbs.

Isaac put his finger on the G of the thumb index and flipped the pages, until he found the exquisite watercolour sketch of the Cymek bird people that introduced the essay on the garuda.

A thumb index, also called a cut-in index, is a round cut-out in the pages of dictionaries, encyclopedias, or other sectioned, often alphabetic, reference works like Bibles, used to locate entries starting at a particular letter or section.