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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.
(Biology) biology osmosis in which water flows from a cell or organism into the surrounding solution. Compare endosmosis
exosmotic, exosmic adj
ex•os•mo•sis(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).
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