
1) Auditory system
Found on
https://www.crosswordclues.com/clue/oval-window

The oval window (or vestibular window) is a membrane-covered opening which leads from the middle ear to the vestibule of the inner ear. Vibrations that come into contact with the tympanic membrane travel through the three ossicles and into the inner ear. The oval window is the intersection of the middle ear with the inner ear, and is directly cont...
Found on
http://en.wikipedia.org/wiki/Oval_window

(from the article `ear, human`) ...the stapes because of their relatively loose coupling. The stapes does not move in and out but rocks back and forth about the lower pole of its ... The ossicular chain not only concentrates sound in a small area but also applies sound preferentially to one window of the cochlea, the oval window ... ...
Found on
http://www.britannica.com/eb/a-z/o/41

Fenestra of the vestibule; an oval opening in the medial wall of the middle ear leading into the vestibule. Normally it is covered by the base of the stapes. ... (12 Dec 1998) ...
Found on
http://www.encyclo.co.uk/local/20973

an oval opening in the inner wall of the middle ear, which is closed by the stapes; called also vestibular window and fenestra vestibuli.
Found on
http://www.encyclo.co.uk/local/21001

Type: Term Definitions: 1. a membrane-covered oval opening on the medial wall of the tympanic cavity leading into the vestibule, closed in life by the foot of the stapes. Synonyms: fenestra vestibuli, fenestra of the vestibule, fenestra ovalis, vestibular window
Found on
http://www.medilexicon.com/medicaldictionary.php?t=99935

An oval opening in the bony wall between the middle and inner ear, into which the footplate of the stapes fits; also called the vestibular window.
Found on
http://www.mhhe.com/biosci/abio/glossary.mhtml

The oval window is a part of the middle ear. It is twenty times smaller than the tympanic membrane and has liquid on its inner side. The middle ear converts the amplified sound waves from the ossicles into mechanical vibrations which are efficiently transferred through the liquid of the inner ear.
Found on
http://www.probertencyclopaedia.com/browse/EO.HTM

Former name for the vestibular window.
Found on
https://academy.allaboutbirds.org/bird-academys-a-to-z-glossary-of-bird-ter

an oval opening at the head of the cochlea, connecting the middle and inner ear, through which sound vibrations of the stapes are transmitted.
Found on
https://www.infoplease.com/dictionary/oval-window
No exact match found.