To undergo exosmosis; to flow outward across a membrane by osmotic pressure.
From exo- 'out' + osmose (from osmosis). The verb form allows the scientific process to become an action, used in chemistry and biology.
When you place a cell in salt water, water flows out of it through osmosis—scientists called this 'exosmose' to show the direction, though we usually just say 'osmosis' now regardless of direction.
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