non-diffusion

Science Dictionary
diffusion   (dĭ-fy'zhən)  Pronunciation Key 
  1. The movement of atoms or molecules from an area of higher concentration to an area of lower concentration. Atoms and small molecules can move across a cell membrane by diffusion. Compare osmosis.

  2. The reflection or refraction of radiation such as light or sound by an irregular surface, tending to scatter it in many directions.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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