noun Anatomy.
one of a layer of cells lining the pulp cavity of a tooth, from which dentin is formed.

1875–80; odonto- + -blast

odontoblastic, adjective
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World English Dictionary
odontoblast (ɒˈdɒntəˌblæst)
any of a layer of cells lining the pulp cavity of a tooth and giving rise to the dentine

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

odontoblast o·don·to·blast (ō-dŏn'tə-blāst')
One of the cells forming the outer surface of dental pulp that produces tooth dentin.

o·don'to·blas'tic adj.
The American Heritage® Stedman's Medical Dictionary
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