judas window (or hole)

noun

1. Bible Judas Iscariot, the disciple who betrayed Jesus: Matt. 26:14, 48
2. Bible Jude, the Apostle
3. Bible a brother of Jesus and James: Mark 6:3; Matt. 13:55
4. a traitor or betrayer
5. Archit. a peephole or small window, as in the door of a prison cell
   in full judas window (or hole)

Origin: ME < LL(Ec) < Gr(Ec) Ioudas < Heb yehūdhāh, Judah