thumb notch


Definition of thumb notch

1 : a notch of a size to admit the tip of a thumb cut in the outer edges of the pages of a book for the insertion of index letters or headings — compare thumb index
2 : a half-moon cut in the sides of a slipcase to facilitate removal of the book

called also thumb cut

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Cite this Entry

“Thumb notch.” Dictionary, Merriam-Webster, Accessed 23 Jan. 2021.

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