Source : Webster's Revised Unabridged Dictionary (1913)

   {Tooth powder}, a powder for cleaning the teeth; a
      dentifrice.

   {Tooth rash}. (Med.) See {Red-gum}, 1.

   {To show the teeth}, to threaten. ``When the Law shows her
      teeth, but dares not bite.'' --Young.

   {To the teeth}, in open opposition; directly to one's face.
      ``That I shall live, and tell him to his teeth .'' --Shak.

Source : WordNet®

tooth powder
     n : a dentifrice in the form of a powder [syn: {toothpowder}]