odontoblast

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. One of the cells forming the outer surface of dental pulp that produces the dentin of a tooth.

Century Dictionary and Cyclopedia

1. n. A cell by which dentine is developed; a cell which produces dentinal tissue, the special substance which largely composes teeth. They occur in the layers of well-defined cells on the surface of the dentinal wall of a tooth, constituting the so-called membrana eboris, and become converted into dentine by the process of calcification. An odontoblast differs from an osteoblast only in the result of its formative activity.

Wiktionary

1. n. A cell on the outer surface of dental pulp that produces tooth dentin

GNU Webster's 1913

1. n. (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.
2. n. (Zoöl.) One of the cells which secrete the chitinous teeth of Mollusca.