the makeup of a set of teeth including their kind, number, and arrangement.
the eruption or cutting of the teeth; teething; odontiasis.

1605–15; < Latin dentītiōn- (stem of dentītiō), equivalent to dentīt(us) (past participle of dentīre to cut teeth, teethe) + -iōn- -ion Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
dentition (dɛnˈtɪʃən)
1.  the arrangement, type, and number of the teeth in a particular species. Man has a primary dentition of deciduous teeth and a secondary dentition of permanent teeth
2.  teething or the time or process of teething
[C17: from Latin dentītiō a teething]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1610s, "teething, the cutting of teeth," from L. dentitionem "teething," noun of action from dentire "to cut the teeth," from dentem (nom. dens) "tooth" (see tooth). Meaning "arrangement of teeth" is from 1849.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

dentition den·ti·tion (děn-tĭsh'ən)

  1. The natural teeth, considered collectively, in the dental arch.

  2. The type, number, and arrangement of a set of teeth.

  3. The process of growing new teeth; teething.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
dentition   (děn-tĭsh'ən)  Pronunciation Key 
The type, number, and arrangement of teeth in an animal species. In mammals, dentition consists of several different types of teeth, including incisors, canines, and molars. The dentition of toothed fish and reptiles usually consists of only one kind of tooth.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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