- RC Church a small aperture in the front of an altar, containing relics
- ecclesiast a niche in the side wall of a chancel, in which the credence or piscina are set
- architect a small window or an opening in a wall
C18: from Latin: a little window, from fenestra window
Examples from the Web for fenestella
But Fenestella reverses the charge, contending that Terence was older than either of them.The Lives Of The Twelve Caesars, Complete
C. Suetonius Tranquillus
I had the privilege of examining the actual grave December 1, 1891, lowering myself from the fenestella under the altar.
Here we see the fenestella confessionis, by means of which pilgrims were allowed to behold and touch the venerable grave.