osmosis

[ oz-moh-sis, os- ]

See synonyms for osmosis on Thesaurus.com

noun

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.

Origin of osmosis

First recorded in 1865–70; Latinized form of obsolete osmose, extracted from endosmose endosmosis, exosmose exosmosis, from French, equivalent to end- end-, ex- ex-² + Greek ōsm(ós) “a push, thrust” + French -ose -osis

Other words from osmosis

os·mot·ic [oz-mot-ik, os-], /ɒzˈmɒt ɪk, ɒs-/, adjective
os·mot·i·cal·ly, adverb
non·os·mot·ic, adjective
non·os·mot·i·cal·ly, adverb
un·os·mot·ic, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

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.
The Elements of Qualitative Chemical Analysis, vol. 1, parts 1 and 2. | Julius Stieglitz
An admirable review of the theories of osmotic pressure, by Lovelace, will be found in the Am.
The Elements of Qualitative Chemical Analysis, vol. 1, parts 1 and 2. | Julius Stieglitz
We may ask, whether this theory cannot be used to explain the connection between osmotic and gaseous pressure.
The Elements of Qualitative Chemical Analysis, vol. 1, parts 1 and 2. | Julius Stieglitz
It is therefore natural to look for the cause of osmotic pressure in kinetic phenomena and not in attractions.
The Elements of Qualitative Chemical Analysis, vol. 1, parts 1 and 2. | Julius Stieglitz
This term must not be confounded with the term osmotic pressure, which has been defined on p. 10.
The Elements of Qualitative Chemical Analysis, vol. 1, parts 1 and 2. | Julius Stieglitz

British Dictionary definitions for osmosis

osmosis

/ (ɒzˈməʊsɪs, ɒs-) /

noun

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

Origin of osmosis

C19: Latinized form from osmose (n), from Greek ōsmos push, thrust

Derived forms of osmosis

osmotic (ɒzˈmɒtɪk, ɒs-), adjective
osmotically, adverb

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

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.

Cultural definitions for osmosis

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.”

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