n :  the intensely hard calcareous substance that forms a thin layer partly covering the teeth of many vertebrates including humans, is the hardest substance of the animal body, and consists of minute prisms secreted by ameloblasts, arranged at right angles to the surface, and bound together by a cement substance - compare CEMENTUM DENTIN  .
 
 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2024.