[ fɪ'nɛstrə ]
■ noun ( plural ~e -tri: )
1》 Anatomy & Zoology a small hole or opening in a bone, especially either of two in the middle ear ( ~ ovalis , ~ rotunda ).
2》 Medicine an artificial opening, especially one made by ~tion.
3》 a perforation in a forceps blade.
Origin
C19: from L., lit. 'window'.