WordNet
n. fenestra leading into the cochlea [syn: fenestra rotunda, fenestra cochleae, fenestra of the cochlea]
Wikipedia
The round window is one of the two openings from the middle ear into the inner ear. It is sealed by the round window membrane, which vibrates with opposite phase to vibrations entering the inner ear through the oval window. It allows fluid in the cochlea to move, which in turn ensures that hair cells of the basilar membrane will be stimulated and that audition will occur.
Usage examples of "round window".
Riberry trees wove about the edges of the round window, leaning in to offer clusters of yellow leaves, and minute markin grubs were sprinkled across the glasswork like the tiniest flaws in glass.
Pleased with himself, he leaned on his elbow in the round window that was the alligator's left eye and waved to the young Chicano peanut vendor across the path.
He had always been there in the intimate round window of the 8 x 60 Jupiters and now it was blank.