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reverse osmosis

noun, Chemistry
1.
the process in which pure water is produced by forcing waste or saline water through a semipermeable membrane.
Origin
1950-1955
1950-55
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for reverse osmosis
  • The membranes used in reverse osmosis are unsuitable for this process because they work best at high pressures.
  • Pumped storage would work for them, as would reverse osmosis water production.
  • Let me start by saying that my reverse osmosis water system is great.
  • They have an ample supply of water to treat and can return the residuals from the reverse osmosis process to the ocean.
British Dictionary definitions for reverse osmosis

reverse osmosis

noun
1.
a technique for purifying water, in which pressure is applied to force liquid through a semipermeable membrane in the opposite direction to that in normal osmosis
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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reverse osmosis in Medicine

reverse osmosis n.
The movement of a solvent in the opposite direction from osmosis in such a manner that the solvent moves from a solution of greater concentration through a membrane to a solution of lesser concentration.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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reverse osmosis in Science
reverse osmosis  

A method of producing pure water by forcing saline or impure water through a semipermeable membrane across which salts or impurities cannot pass. Reverse osmosis is used for water filtration, for desalinization of seawater, and in kidney dialysis machines.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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