tooth powder

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tooth powder (countable and uncountable, plural tooth powders)

  1. A powder for cleaning the teeth; a dentifrice.
    • 1918, Hannah Teresa Rowley, ‎Mrs. Helen Louise (Wales) Farrell, Principles of Chemistry Applied to the Household
      Precipitated calcium carbonate, a very fine powdery form, is used as a basis for many tooth powders and pastes. As whiting it finds a wide use in cleaning metals of their tarnishes.