fenestella

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fenestella

(ˌfɛnɪˈstɛlə)
n, pl -lae (-liː)
1. (Ecclesiastical Terms) RC Church a small aperture in the front of an altar, containing relics
2. (Ecclesiastical Terms) ecclesiast a niche in the side wall of a chancel, in which the credence or piscina are set
3. (Architecture) architect a small window or an opening in a wall
[C18: from Latin: a little window, from fenestra window]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.fenestella - oval or circular opening; to allow light into a dome or vault
opening - a vacant or unobstructed space that is man-made; "they left a small opening for the cat at the bottom of the door"
vault - an arched brick or stone ceiling or roof