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Pronunciation: pow'der


  1. A dry mass of minute separate particles of any substance.
  2. In pharmaceutics, a homogeneous dispersion of finely divided, relatively dry, particulate matter consisting of one or more substances; the degree of fineness of a pow'der is related to passage of the material through standard sieves.
  3. A single dose of a powdered drug, enclosed in an envelope of folded paper.
  4. To reduce a solid substance to a state of fine division.

[Fr. poudre; L. pulvis]

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