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Definition of Fenestra vestibuli
1. Noun. Fenestra that has the base of the stapes attached to it.
Medical Definition of Fenestra vestibuli
1. An oval opening on the medial wall of the tympanic cavity leading into the vestibule, closed in life by the foot of the stapes. Synonym: fenestra of the vestibule, fenestra ovalis, oval window, vestibular window. (05 Mar 2000)