a paste, powder, liquid, or other preparation for cleaning the teeth.

1550–60; < Middle French < Latin dentifricium tooth powder, equivalent to denti- denti- + fric(āre) to rub + -ium -ium Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
dentifrice (ˈdɛntɪfrɪs)
any substance, esp paste or powder, for use in cleaning the teeth
[C16: from Latin dentifricium tooth powder, from dent-, dens tooth + fricāre to rub]

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

1550s, from Fr. dentifrice (15c.), from L. dentifricium, from dentem (nom. dens) "tooth" (see tooth) + fricare "to rub."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

dentifrice den·ti·frice (děn'tə-frĭs')
A substance, such as a paste or powder, for cleaning the teeth.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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