The phenomenon where a cell loses water through osmosis is called plasmolysis.

Here's a breakdown:

* Osmosis: The movement of water molecules across a semi-permeable membrane from a region of high water concentration to a region of low water concentration.

* Plasmolysis: The shrinking of the cytoplasm of a cell away from the cell wall due to the loss of water through osmosis. This occurs when the cell is placed in a hypertonic solution, meaning the concentration of solutes outside the cell is higher than inside the cell.

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