1. Small, hard structures found in the inner ear of vertebrates that help maintain balance and detect head movement.
Usage: Plural form of otolith; Also called ear stones or statoliths; Commonly used in biology and anatomy
2. In fish and other aquatic animals, calcium carbonate structures used to determine age by counting growth rings, similar to tree rings.
Usage: Used in fisheries science and marine biology

Examples

• The otoliths in your inner ear contain crystals that shift when you move your head.
• Fish otoliths are examined by scientists to determine the age of individual fish.
• Damage to the otoliths can result in dizziness and balance problems.
• Marine biologists study otoliths to learn about fish populations and growth rates.
• The otoliths help aquatic animals sense gravity and maintain orientation underwater.