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Definitions from WordNet

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Capillary Action

Definition: Capillary action refers to the process by which liquids are drawn into narrow spaces or tubes against the force of gravity, due to the cohesive forces between the liquid molecules and the adhesive forces between the liquid and the surface of the tube or space.

Examples:

1. When you dip a paper towel into a glass of water, capillary action causes the water to rise up through the small spaces between the fibers of the paper towel.
2. The ability of plants to transport water from their roots to the leaves is possible because of the capillary action within the tiny tubes present in the plant's vascular system.
3. Ink is drawn up into the nib of a fountain pen through capillary action, allowing for smooth and controlled writing.

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