tympanic membraneOur editors are putting together more complete content — check back in about 20 minutestympanic membranetympanic membrane — noun名詞1. a thin membrane that separates the outer ear from the middle ear and vibrates wh1.名詞釋義a thin membrane that separates the outer ear from the middle ear and vibrates when sound waves hit it例句The doctor examined her tympanic membrane for signs of infection.