fenestra
Concise Oxford English Dictionary © 2008 Oxford University Press:
fenestra /fɪˈnɛstrə/
▶noun (pl. fenestrae /-triː/)
- 1 Anatomy & Zoology a small hole or opening in a bone, especially either of two in the middle ear (fenestra ovalis, fenestra rotunda).
- 2 Medicine an artificial opening, especially one made by fenestration.
- 3 a perforation in a forceps blade.
– origin C19: from L., lit. ‘window’.
'fenestra' also found in these Oxford entries:

