noun
oval window; fenestra ovalis
Anatomical term for the membrane-covered opening between the middle ear and the inner ear. Related to 前庭窓 (vestibular window).
See also: 前庭窓
卵円窓は中耳と内耳の間にある小さな開口部です。
The oval window is a small opening between the middle ear and the inner ear.
Also refers to the oval window; 卵円窓 is a synonym, though 前庭窓 may be more common in some contexts.
From 卵 (egg, oval) + 円 (circle, round) + 窓 (window), describing the oval-shaped opening.