- A dry mass of minute separate particles of any substance.
- 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.
- A single dose of a powdered drug, enclosed in an envelope of folded paper.
- To reduce a solid substance to a state of fine division.
[Fr. poudre; L. pulvis]
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Examples: glitazone, GI cocktail, etc.