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thumb index
1noun
- 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)
- to provide (a book) with a thumb index.
thumb index
noun
- a series of indentations cut into the fore edge of a book to facilitate quick reference
verb
- tr to furnish with a thumb index
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Word History and Origins
Origin of thumb index1
First recorded in 1900–05
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