Word.ws English Dictionary

thumb index

thumb index noun: a series of alphabetically marked or otherwise labelled semicircular cut-outs in the fore edge of a large reference book, encyclopaedia, Bible, etc., that allows quick access to various parts of the text.

thumb index: a series of alphabetically marked or otherwise labelled semicircular cut-outs in the fore edge of a...
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Noun

thumb index (plural thumb indexes)

  1. A series of alphabetically marked or otherwise labelled semicircular cut-outs in the fore edge of a large reference book, encyclopaedia, Bible, etc., that allows quick access to various parts of the text.

Forms of thumb index

pluralthumb indexes

Questions about thumb index

What does thumb index mean?
Thumb index means a series of alphabetically marked or otherwise labelled semicircular cut-outs in the fore edge of a large reference book, encyclopaedia, Bible, etc., that allows quick access to various parts of the text.
What part of speech is thumb index?
Thumb index is a noun.
What is the plural of thumb index?
The plural of thumb index is thumb indexes.

Words near thumb index in the dictionary

  1. thumb down
  2. thumb drive
  3. thumb drives
  4. thumb fight
  5. thumb fights
  6. thumb index
  7. thumb indexes
  8. thumb knot
  9. thumb knots
  10. Thumb Master
  11. thumb on the scale

Source and license

Adapted from Wiktionary: thumb index (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Cite this entry: “thumb index.” Word.ws, https://word.ws/thumb_index. Based on Wiktionary, CC BY-SA 4.0.