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1. (n.) dentin
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.
Etymology: (1830–40; < L dent-, s. of dēnstooth+ -in1)
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| Definition of 'dentin' |
Princeton's WordNet |
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1. (noun) dentine, dentin
a calcareous material harder and denser than bone that comprises the bulk of a tooth
2. (noun) dentine, dentin
bone (calcified tissue) surrounding the pulp cavity of a tooth
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| Definition of 'dentin' |
U.S. National Library of Medicine |
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1. dentin
The hard portion of the tooth surrounding the pulp, covered by enamel on the crown and cementum on the root, which is harder and denser than bone but softer than enamel, and is thus readily abraded when left unprotected. (From Jablonski, Dictionary of Dentistry, 1992)
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Definitions of dentin 
