What describes the movement of water when a cell shrinks and shrivels due to osmosis

That is called plasmolysis

plasmolysis in plant cells and haemolysis in animal cells

Explanation:

When the outside environment of a cell is hypertonic, water molecules tend to move from the cell. This is a movement from a highly concentrated area to a lowly concentrated area. The cells will shrink and shrivel. The movement of water moleculea from a high concentrated region to a low concentrated region is called osmosis.