[ oz-moh-sis, os- ]
/ ɒzˈmoʊ sɪs, ɒs- /
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Physical Chemistry, Cell Biology.
- the tendency of a fluid, usually water, to pass through a semipermeable membrane into a solution where the solvent concentration is higher, thus equalizing the concentrations of materials on either side of the membrane.
- the diffusion of fluids through membranes or porous partitions.Compare endosmosis, exosmosis.
a subtle or gradual absorption or mingling: He never studies but seems to learn by osmosis.
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Origin of osmosis
OTHER WORDS FROM osmosis
os·mot·ic [oz-mot-ik, os-], /ɒzˈmɒt ɪk, ɒs-/, adjectiveos·mot·i·cal·ly, adverbnon·os·mot·ic, adjectivenon·os·mot·i·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use osmosis in a sentence
In regard to the rle of heat of dilution in connection with osmotic pressure, see Bancroft, J. Phys.
An admirable review of the theories of osmotic pressure, by Lovelace, will be found in the Am.
We may ask, whether this theory cannot be used to explain the connection between osmotic and gaseous pressure.
It is therefore natural to look for the cause of osmotic pressure in kinetic phenomena and not in attractions.
This term must not be confounded with the term osmotic pressure, which has been defined on p. 10.
British Dictionary definitions for osmosis
/ (ɒzˈməʊsɪs, ɒs-) /
the passage of a solvent through a semipermeable membrane from a less concentrated to a more concentrated solution until both solutions are of the same concentration
diffusion through any membrane or porous barrier, as in dialysis
gradual or unconscious assimilation or adoption, as of ideas
Derived forms of osmosisosmotic (ɒzˈmɒtɪk, ɒs-), adjectiveosmotically, adverb
Word Origin for osmosis
C19: Latinized form from osmose (n), from Greek ōsmos push, thrust
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
Scientific definitions for osmosis
[ ŏz-mō′sĭs ]
The movement of a solvent through a membrane separating two solutions of different concentrations. The solvent from the side of weaker concentration usually moves to the side of the stronger concentration, diluting it, until the concentrations of the solutions are equal on both sides of the membrane.♦ The pressure exerted by the molecules of the solvent on the membrane they pass through is called osmotic pressure. Osmotic pressure is the energy driving osmosis and is important for living organisms because it allows water and nutrients dissolved in water to pass through cell membranes.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Cultural definitions for osmosis
[ (ahz-moh-sis, ahs-moh-sis) ]
The seeping of a fluid through a seemingly solid barrier, such as a cell wall or a rubber sheet. When the concentration of the fluid is the same on both sides of the barrier, osmosis stops.
notes for osmosis
Informally, “osmosis” is the process by which information or concepts come to a person without conscious effort: “Living in Paris, he learned French slang by osmosis.”
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.