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thumb index

1

noun

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


thumb-index

2

[ thuhm-in-deks ]

verb (used with object)

  1. to provide (a book) with a thumb index.

thumb index

noun

  1. a series of indentations cut into the fore edge of a book to facilitate quick reference
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


verb

  1. tr to furnish with a thumb index
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of thumb index1

First recorded in 1900–05

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