fenestra rotunda

round win·dow

[TA]

an opening on the medial wall of the middle ear leading into the cochlea, closed in life by the secondary tympanic membrane.

Synonym(s): fenestra cochleae [TA], cochlear window, fenestra of the cochlea, fenestra rotunda

fenestra

(fe-nes'tra) plural.fenestrae [L., window]

1. An aperture frequently closed by a membrane.

2. An open area, as in the blade of an obstetrical forceps. fenestral (-tral), adjective

fenestra cochleae

Round window.

fenestra rotunda

Round window.

fenestra vestibuli

Oval window.