dentin
/ˈdɛntɪn/
noun
- The hard, dense, bony tissue that forms the main part of a tooth, beneath the enamel and surrounding the pulp.
- The dentist explained that the cavity had reached the dentin, causing sensitivity.
- Tooth enamel is the hardest substance in the body, but dentin is also very strong.
- When dentin is exposed, hot or cold foods can cause a sharp pain.