earstone
/ˈɪrˌstoʊn/
noun
- A small, hard structure inside the inner ear of vertebrates that helps with balance and hearing; also called an otolith.
- Scientists study earstones to learn about the hearing abilities of ancient animals.
- The fish's earstone can be examined to determine its age.
- A damaged earstone can cause a person to feel dizzy or lose their balance.
Synonyms