thumb index

• Série d'encoches ou de creux arrondis découpés dans la tranche des pages d'un livre, souvent marqués par des lettres ou des sections, permettant au lecteur de trouver rapidement une partie du livre avec le pouce.

A series of rounded cutouts or notches along the edge of a book's pages, typically labeled with letters or sections, allowing the reader to quickly locate a specific part of the book by using their thumb.

1. Book featureB2formal

   A series of notches or cut-out tabs on the edges of a book's pages, usually marked with letters or symbols, to help quickly find a specific section.

   Index en onglets

   • The dictionary has a thumb index for each letter of the alphabet.
   • I prefer books with a thumb index for easy reference.
   • The thumb index made it simple to locate the chapter on grammar.