| dispersal | <microscopy> The variation of refractive index with colour (or wave-length) of light. The spreading of white light into its component colours when passing through a glass prism is due to dispersion which, in turn, is due to the fact that the refractive index of transparent substances is lower for long wavelengths than for-short wavelengths. A measure of dispersion is defined as: nD - 1 v= nF-nC where nD = refractlve index at 589 nm (yellow), nF = 486 nm (blue), nC = 656 nm (red). (05 Aug 1998) |
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| dispersal habitat | Forest vegetation with at least 40% canopy closure and an average stand diameter of 11". These stands are used by the owls to disperse or move from one area of nesting or foraging habitat to another. (05 Dec 1998) |
| flash dispersal | The property of rapid disintegration of a tablet when placed on the tongue. (05 Mar 2000) |
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| dispersal | the act of dispersing or diffusing something |
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