Definitions for "Thumb Index"
A series of rounded notches cut into the fore-edges of a book, with or without tabs let in and bearing in progressive order from top to bottom the letters or words showing the arrangement. Usually provided for Bible, Quran and dictionaries.
one of a series of rounded notches in the fore edge of a book to indicate sections
Alphabetical or subject index cut into the fore-edge of a book (thumb cut) to facilitate quick reference. Dictionaries are sometimes thumb cut.
(n.) A projection of metal on a key bow which serves as a tactile means of orienting a non reversible key for correct lock insertion. Source: Lock Industry Standards and Training (LIST) Council