middle ear

The middle ear is the portion of the ear internal to the eardrum, and external to the oval window of the cochlea. The mammalian middle ear contains three ossicles, which couple vibration of the eardrum into waves in the fluid and membranes of the inner ear. The hollow space of the middle ear has also been called the tympanic cavity, or cavum tympani. The eustachian tube joins the tympanic cavity with the nasal cavity (nasopharynx), allowing pressure to equalize between the inner ear and throat.
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Middle ear n. The space located between the eardrum and the inner ear that contains the three auditory ossicles, which convey vibrations through the [more]Middle ear - Community and Resources

Noun
1. the main cavity of the ear; between the eardrum and the inner ear
(synonym) tympanic cavity, tympanum
(hypernym) cavity, bodily cavity, cavum
(part-holonym) auditory apparatus
(part-meronym) ossicle, bonelet, ossiculum

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