411 REFERENCE · Wiktionary
Judas-hole
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Noun
A small hole in a door through which a person can spy without being seen from the other side, used especially in prisons.
en Judas Judas window
en w:Stanley J. Weyman 1922 1901 https://www.gutenberg.org/cache/epub/15763/pg15763-images.html Count Hannibal: A Romance of the Court of France A moment, and an iron-grated Judas-hole in the door slid open, and a servant, an elderly man, sleek and respectable, looked out at him.
Translations
Bulgarian: bg шпионка f
French: fr judas m
en eponyms
en Prison