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[oz-moh-reg-yuh-ley-shuh n, os-] /ˌɒz moʊˌrɛg yəˈleɪ ʃən, ˌɒs-/
the process by which cells and simple organisms maintain fluid and electrolyte balance with their surroundings.
1930-35; osmo- + regulation Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for osmoregulation


(zoology) the adjustment of the osmotic pressure of a cell or organism in relation to the surrounding fluid
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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osmoregulation in Medicine

osmoregulation n.
The maintenance of an optimal constant osmotic pressure in the body of a living organism.

os'mo·reg'u·la·to'ry (-lə-tôr'ē, -tōr'ē) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for osmoregulation

in biology, maintenance by an organism of an internal balance between water and dissolved materials regardless of environmental conditions. In many marine organisms osmosis (the passage of solvent through a semipermeable membrane) occurs without any need for regulatory mechanisms because the cells have the same osmotic pressure as the sea. Other organisms, however, must actively take on, conserve, or excrete water or salts in order to maintain their internal water-mineral content.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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