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percolation (n.)

"the act of straining or filtering through some porous material," 1610s, from Latin percolationem (nominative percolatio) "a straining through; the act of filtering," noun of action from past-participle stem of percolare "to strain through, filter," from per "through" (from PIE root *per- (1) "forward," hence "through") + colare "to strain," from colum "a strainer" (see colander).

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Definitions of percolation from WordNet

percolation (n.)
the slow passage of a liquid through a filtering medium;
the percolation of rainwater through the soil
Synonyms: infiltration
percolation (n.)
the act of making coffee in a percolator;
percolation (n.)
the filtration of a liquid for extraction or purification;
From wordnet.princeton.edu