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[den-tn, -tin] /ˈdɛn tn, -tɪn/
noun, Dentistry.
the hard, calcareous tissue, similar to but denser than bone, that forms the major portion of a tooth, surrounds the pulp cavity, and is situated beneath the enamel and cementum.
Also, dentine
[den-teen] /ˈdɛn tin/ (Show IPA)
1830-40; dent- + -in2
Related forms
dentinal, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for dentinal
  • The three dimensional configuration of the dentinal tubules is genetically determined.
Word Origin and History for dentinal



also dentine, the hard substance in teeth, 1836, from comb. form of Latin dens (genitive dentis) "tooth" (see tooth) + chemical suffix -in (2).

Online Etymology Dictionary, © 2010 Douglas Harper
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dentinal in Medicine

dentinal den·tin·al (děn'tə-nəl, děn-tē'-)
Of or relating to dentin.

dentin den·tin (děn'tĭn) or den·tine (-tēn')
The main, calcareous part of a tooth, beneath the enamel and surrounding the pulp chamber and root canals.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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dentinal in Science
The main bony part of a tooth beneath the enamel, surrounding the pulp chamber and root canals.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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dentinal in Culture

dentin definition

The hard, bony material beneath the enamel of a tooth. The bulk of a tooth is made up of dentin.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Encyclopedia Article for dentinal


in anatomy, the yellowish tissue that makes up the bulk of all teeth. It is harder than bone but softer than enamel and consists mainly of apatite crystals of calcium and phosphate. In humans, other mammals, and the elasmobranch fishes (e.g., sharks, rays), a layer of dentine-producing cells, odontoblasts, line the pulp cavity of the tooth (or, in the case of sharks, the toothlike scale) and send projections into the calcified material of the dentine; these projections are enclosed in tubules. Sensitivity to pain, pressure, and temperature is transmitted via the odontoblastic extensions in the tubules to and from the nerve in the pulp chamber. Secondary dentine, a less well-organized form of tubular dentine, is produced throughout life as a patching material where cavities have begun, where the overlying enamel has been worn away, and within the pulp chamber as part of the aging process.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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