Relating to or involving both the antrum and the tympanum (eardrum or middle ear cavity).
From Latin 'antrum' (cave) + Latin 'tympanum' (drum, tympanum). An anatomical term combining two Latin terms for two different cavities in the ear region that are anatomically related.
Your ear is like a series of connected caves—the antrum and tympanum are two chambers that can get infected together, so doctors needed a word to describe problems affecting both at once.
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