dentin - definition of dentin by The Free Dictionary
den·tin (dĕn′tĭn) or den·tine (-tēn′) n. The main, calcareous part of a tooth, beneath the enamel and surrounding the pulp chamber and root canals. den′tin·al (dĕn′tə-nəl, dĕn-tē′-) adj. den•tin (ˈdɛn tn, -tɪn) also den•tine (-tin) n. the hard, calcareous...