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 (ĕk′sŏz-mō′sĭs, -sŏs-)
The passage of a fluid through a semipermeable membrane toward a solution of lower concentration, especially the passage of water through a cell membrane into the surrounding medium.

ex′os·mot′ic (-mŏt′ĭk) adj.


(ˌɛksɒzˈməʊsɪs; -sɒs-)
(Biology) biology osmosis in which water flows from a cell or organism into the surrounding solution. Compare endosmosis
exosmotic, exosmic adj


(ˌɛk sɒsˈmoʊ sɪs, ˌɛk sɒz-)

1. osmosis toward the outside of a cell or vessel.
2. the flow of a substance from an area of greater concentration to one of lower concentration (opposed to endosmosis).
[1830–40; Latinization of now obsolete exosmose < French; see ex-2, osmosis]
ex`os•mot′ic (-ˈmɒt ɪk) adj.


(in osmosis) the slower spread of the more dense fluid through the membrane to merge with the less dense. Cf. endosmosis. — exosmotic, adj.
See also: Processes
References in periodicals archive ?
some larvae refused to feed), exosmosis of ecdysial fluid (Fig.
Ingesting 20E caused decreased feeding in larvae, exosmosis of ecdysial fluid, failure of removal of the old head capsule or exuvium, morphogenesis into a deformed pupa, bulging of the hindgut, and supernumerary instars.
plasmolysis: shrinking of the cytoplasm of a living cell from the cell wall because of water loss by exosmosis.