Final answer:
Otosclerosis is the medical term for hardening of the ear, which is a condition characterized by abnormal bone growth in the middle ear.
Step-by-step explanation:
Hardening of the ear is known as otosclerosis. Otosclerosis is a condition where abnormal bone growth in the middle ear causes hearing loss. It commonly affects the stapes bone, which is important for transmitting sound vibrations to the inner ear.
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