osmotic pressure

noun Physical Chemistry.
the force that a dissolved substance exerts on a semipermeable membrane, through which it cannot penetrate, when separated by it from pure solvent.

Origin:
1885–90

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Collins
World English Dictionary
osmotic pressure
 
n
the pressure necessary to prevent osmosis into a given solution when the solution is separated from the pure solvent by a semipermeable membrane

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

osmotic pressure n.
The pressure exerted by the flow of water through a semipermeable membrane separating two solutions with different concentrations of solute.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
To provide the osmotic pressure, you need to generate the pressure from your energy source.
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