- 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.
Origin of osmosis
Examples from the Web for osmosis
Without the process of osmosis we should be unable to use much of the food we eat.
I do believe in the osmosis of evil, in the diffusion of villainy, in the corruption of the soul.After the Rain|Sam Vaknin
The first experiment in physiogeny was the discovery of osmosis by the Abb Nollet in 1748.The Mechanism of Life|Stphane Leduc
Nourishment passes through them by a simple process of osmosis.Embryology|Gerald R. Leighton
In simple animals, as the sponge and hydra, no such organs are needed, the fluid food passing from cell to cell by osmosis.
British Dictionary definitions for osmosis
Word Origin for osmosis
Word Origin and History for osmosis
1867, Latinized from osmose (1854), shortened from endosmosis (1830s), from endosmose "inward passage of a fluid through a porous septum" (1829), from French endo- "inward" + Greek osmos "a thrusting, a pushing," from stem of othein "to push, to thrust," from PIE *wedhe- "to push, strike" (cf. Sanskrit vadhati "pushes, strikes, destroys," Avestan vadaya- "to repulse"). Figurative sense is from 1900. Related: Osmotic (1854, from earlier endosmotic).