dentin

Noun dentin has 2 senses

• dentin(n = noun.substance) dentine - a calcareous material harder and denser than bone that comprises the bulk of a tooth;
is a kind of animal material
has particulars: ivory, tusk

• dentin(n = noun.body) dentine - bone (calcified tissue) surrounding the pulp cavity of a tooth;
is a kind of bone, os
is a part of tooth