thumb index

thumb index

noun

Definition of THUMB INDEX

: a series of usually labeled notches cut in the fore edge of a book (as a dictionary) to facilitate reference

Examples of THUMB INDEX

1. a dictionary that has a thumb index

First Known Use of THUMB INDEX

1903

Rhymes with THUMB INDEX

belowdecks, biconvex, circumflex, Cornish rex, cross-index, Devon rex, gentle sex, googolplex, haruspex, intersex, Malcolm X, megaplex, Middlesex, multiplex, oral sex, PBX, pontifex, price index, retroflex, spinifex, subindex, unisex