Pronunciation: (ek"sos-mō'sis, ek"soz-), [key]
1. Biol.osmosis toward the outside of a cell or vessel.
2. Physical Chem.the flow of a substance from an area of greater concentration to one of lower concentration (opposed to endosmosis).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.