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You may be wondering what the term Osmosis actually means.  Osmosis is the name given to water moving through a membrane that allows the movement of water, but does not allow the movement of one or more solutes (a solute is a molecule dissolved in a solution).  If there is equal pressure on both sides of the membrane, the water will generally osmose from the side containing a lower concentration of solute, to the side containing the higher concentration of solute.