| fenestra rotunda | An opening on the medial wall of the middle ear leading into the cochlea, closed in life by the secondary tympanic membrane. Synonym: cochlear window, fenestra of the cochlea, fenestra rotunda, round window. (05 Mar 2000) |
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| fossula rotunda | A depression on the medial wall of the middle ear which has the fenestra cochleae (round window) in its lower portion. Synonym: fossula rotunda, little fossa of the cochlear window. (05 Mar 2000) |
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| fenestra | Origin: L, a window. <anatomy> A small opening; especially, one of the apertures, closed by membranes, between the tympanum and internal ear. Source: Websters Dictionary (01 Mar 1998) |
| fenestra cochleae | An opening on the medial wall of the middle ear leading into the cochlea, closed in life by the secondary tympanic membrane. Synonym: cochlear window, fenestra of the cochlea, fenestra rotunda, round window. (05 Mar 2000) |
| fenestra nov-ovalis | Artificial opening through the otic capsule of the lateral saemicircular canal, connecting the membranous labyrinth with the mastoid cavity produced during fenestration surgery. (05 Mar 2000) |
| fenestra of the cochlea | An opening on the medial wall of the middle ear leading into the cochlea, closed in life by the secondary tympanic membrane. Synonym: cochlear window, fenestra of the cochlea, fenestra rotunda, round window. (05 Mar 2000) |
| fenestra of the vestibule | An oval opening on the medial wall of the tympanic cavity leading into the vestibule, closed in life by the foot of the stapes. Synonym: fenestra of the vestibule, fenestra ovalis, oval window, vestibular window. (05 Mar 2000) |
| fenestra ovalis | An oval opening on the medial wall of the tympanic cavity leading into the vestibule, closed in life by the foot of the stapes. Synonym: fenestra of the vestibule, fenestra ovalis, oval window, vestibular window. (05 Mar 2000) |
| fenestra vestibuli | An oval opening on the medial wall of the tympanic cavity leading into the vestibule, closed in life by the foot of the stapes. Synonym: fenestra of the vestibule, fenestra ovalis, oval window, vestibular window. (05 Mar 2000) |