Top Qs
Timeline
Chat
Perspective
decoder ring
From Wiktionary, the free dictionary
Remove ads
English
Noun
decoder ring (plural decoder rings)
- A device consisting of two concentric rings of letters of the alphabet, one of which can be rotated, so as to encode and decode messages according to a simple substitution cipher.
Wikiwand - on
Seamless Wikipedia browsing. On steroids.
Remove ads