round window

noun

a membrane-covered opening in the inner wall of the middle ear that compensates for changes in cochlear pressure.

Origin of round window

First recorded in 1900–05

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

round window in Medicine

round window

n.

An opening on the medial wall of the middle ear that leads into the cochlea and is covered by the secondary tympanic membrane.fenestra of cochlea

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.