Percolation

n. penetration, permeation; bubbling; filtration

In chemistry and materials science, percolation concerns the movement and filtering of fluids through porous materials. During the last three decades, percolation theory, an extensive mathematical model of percolation, has brought new understanding and techniques to a broad range of topics in physics, materials science aswell as geography.
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Noun
1. the slow passage of a liquid through a filtering medium; "the percolation of rainwater through the soil"; "the infiltration of seawater through the lava"
(synonym) infiltration
(hypernym) filtration
(derivation) leach, percolate
2. the act of making coffee in a percolator
(hypernym) cooking, cookery, preparation
(derivation) percolate
3. the filtration of a liquid for extraction or purification
(hypernym) filtration
(derivation) percolate

n. percolation, penetration, permeation; bubbling; filtration

(n.)
The act or process of percolating, or filtering; filtration; straining. Specifically (Pharm.), the process of exhausting the virtues of a powdered drug by letting a liquid filter slowly through it.