A small bone supporting the tympanic membrane in some vertebrates.
- A slip may be given to the tympanic bone, stylomandibular ligament, or mandible at its angle.
- In the region of the ear, the tympanic bone is semicircular, and the petrosal is massive and only loosely bound to the basicranium.
- The tympanic bone is distinctively annular (ring-shaped).
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Syllabification: tym·pan·ic bone
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