odontoblast

from The Collaborative International Dictionary of English v.0.48

Odontoblast \O*don"to*blast\, n. [Odonto- + -blast.]
   [1913 Webster]
   1. (Anat.) One of the more or less columnar cells on the
      outer surface of the pulp of a tooth; an odontoplast. They
      are supposed to be connected with the formation of
      dentine.
      [1913 Webster]

   2. (Zool.) One of the cells which secrete the chitinous teeth
      of Mollusca.
      [1913 Webster]