Etymology
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dentifrice (n.)

early 15c., dentifricie, "substance used in cleaning the teeth," from Latin dentifricium "powder for rubbing the teeth," from dens (genitive dentis) "tooth" (from PIE root *dent- "tooth") + fricare "to rub" (see friction).

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Definitions of dentifrice

dentifrice (n.)
a substance for cleaning the teeth; applied with a toothbrush;
From wordnet.princeton.edu