osmosis(redirected from Pressure barrier osmosis)
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Related to Pressure barrier osmosis: osmotic pressure, osmotic
n. pl. os·mo·ses (-sēz)
a. Diffusion of fluid through a semipermeable membrane from a solution with a low solute concentration to a solution with a higher solute concentration until there is an equal solute concentration on both sides of the membrane.
b. The tendency of fluids to diffuse in such a manner.
2. A gradual, often unconscious process of assimilation or absorption: learned French by osmosis while residing in Paris for 15 years.
[From obsolete osmose, from earlier endosmose, from French : Greek endo-, endo- + Greek ōsmos, thrust, push (from ōthein, to push).]
os·mot′ic (-mŏt′ĭk) adj.
1. (Biology) 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
2. (Chemistry) 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
3. (General Physics) diffusion through any membrane or porous barrier, as in dialysis
4. gradual or unconscious assimilation or adoption, as of ideas
[C19: Latinized form from osmose (n), from Greek ōsmos push, thrust]
os•mo•sis(ɒzˈmoʊ sɪs, ɒs-)
a. the tendency of a fluid, usu. 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.
b. the diffusion of fluids through membranes or porous partitions.
2. a subtle or gradual absorption: to learn by osmosis.
[1865–70; Latinized form of now obsolete osmose osmosis, extracted from endosmose endosmosis < French, =end- end- + Greek ōsm(ós) push, thrust + French -ose -osis]
os•mot′ic (-ˈmɒt ɪk) adj.
left: The concentration of sugar molecules is greater on the right side of the membrane than on the left. The water molecules are small enough to move across the membrane, but the larger sugar molecules cannot pass through.
right: The water molecules move across the membrane until the water and sugar molecules are of equal concentration on both sides. This lowers the water level on the left side and raises it on the right side.
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 process by which fluids pass through a semipermeable membrane into a solution of lower concentration to equalize the concentration on both sides of the membrane. — osmotic, adj.See also: Processes
the process by which fluids pass through a semipermeable membrane into a solution of lower concentration to equalize the concentration on both sides of the membrane. — osmotic, adj.See also: Cells
1. Movement of water through a selectively permeable membrane, e.g. a cell membrane.
2. The movement of solvent molecules through a semipermeable membrane from a dilute solution to a more concentrated solution.
3. Diffusion of a fluid (e.g., water) through a semipermeable membrane.
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|Noun||1.||osmosis - (biology, chemistry) diffusion of molecules through a semipermeable membrane from a place of higher concentration to a place of lower concentration until the concentration on both sides is equal|
dialysis - separation of substances in solution by means of their unequal diffusion through semipermeable membranes
chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
diffusion - (physics) the process in which there is movement of a substance from an area of high concentration of that substance to an area of lower concentration
reverse osmosis - (chemistry) a method of producing pure water; a solvent passes through a semipermeable membrane in a direction opposite to that for natural osmosis when it is subjected to a hydrostatic pressure greater than the osmotic pressure
n → Osmose f
osmosis[ɒzˈməʊsɪs] n → osmosi f
n. osmosis, difusión de un solvente a través de una membrana semipermeable interpuesta entre soluciones de concentración diferente.