Dictionary
mid'dle ear'
Anat.
the middle portion of the ear, consisting of the tympanic membrane and an air-filled chamber lined with mucous membrane, that contains the malleus, incus, and stapes. Cf.
ear 1 (def. 1). See diag. under
ear1. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.