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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.

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

reverse osmosis

  1. 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.
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Word History and Origins

Origin of reverse osmosis1

First recorded in 1950–55
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