otolith
/ˈoʊtəˌlɪθ/
noun
- A small, calcium carbonate structure in the inner ear of vertebrates that helps with balance and hearing.
- Doctors study the otolith to understand balance disorders in humans.
- The tiny otolith moves when you tilt your head, sending signals to your brain.
- The otolith in a fish's ear can reveal its age, much like tree rings.