What is the meaning of thumb index?

noun

  • One of a series of rounded notches in the fore edge of a book to indicate sections. .
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). thumb index. Retrieved September 22, 2026, from http://smartdefine.org/thumb_index/definitions/1208992
ChicagoWordNet. 2010. "thumb index" http://smartdefine.org/thumb_index/definitions/1208992 (accessed September 22, 2026).
HarvardWordNet 2010, thumb index, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/thumb_index/definitions/1208992>.
MLAWordNet. "thumb index" 23 October 2010. Web. 22 September 2026. <http://smartdefine.org/thumb_index/definitions/1208992>