# Jefferson disk

> English word · Noun

## Definitions
1. Any of a set of stackable disks, each having the letters of the alphabet arranged in some sequence around its edge, used in a cipher system.

## Etymology
Commonly attributed to Thomas Jefferson.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/jefferson-disk