eardrum
nounUK /ˈɪə.drʌm/
US /ˈɪr.drʌm/
A thin part inside your ear that shakes when sound comes in and helps you hear.
The loud bang made his eardrum hurt for a moment.
OTHER MEANINGS
2. The membrane that separates the outer ear from the middle ear and vibrates with sound waves.
Doctors checked her eardrum to see if it was damaged.
3. A structure in some animals, such as frogs, that works like a hearing membrane on the skin.
The frog's eardrum is visible just behind its eye.
4. A thin sheet stretched tight like a drum, used in instruments or devices.
The drum's eardrum-like surface vibrated under the stick.