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What does osmotic pressure mean?

Looking for the meaning or definition of the word osmotic pressure? Here's what it means.

Noun
  1. (physical chemistry) The hydrostatic pressure exerted by a solution across a semipermeable membrane from a pure solvent; the pressure needed to counteract osmosis.
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Examples
It is a remarkable fact that plasmolytic research affords no evidence of any decrease in osmotic pressure.
Another phenomenon connected with solutions, which has received much attention, is that of osmotic pressure.
The osmolal concentration of TEG and MG were calculated from the dependence of their osmotic pressure on molal concentration.
If a U-shaped glass tube were divided in two by a semipermeable membrane and filled with two solutions the osmotic pressure could be shown.
The glucose osmotic pressure in solution with water is proportional to the glucose concentration in the outer solution.
The driving force for the osmotic pressure is the higher concentration of sodium ions in the beads than in the outside water.

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