thumb index

thumb index

a series of labeled notches cut along the fore edge of a book, to indicate the divisions or sections.

1900–05 Unabridged


verb (used with object)
to provide (a book) with a thumb index. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
thumb index
1.  a series of indentations cut into the fore edge of a book to facilitate quick reference
2.  (tr) to furnish with a thumb index

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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