percolation
noun
per·co·la·tion
| \ ˌpər-kə-ˈlā-shən
\
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Medical Definition of percolation
1
: the slow passage of a liquid through a filtering medium
2
: a method of extraction or purification by means of filtration
3
: the process of extracting the soluble constituents of a powdered drug by passage of a liquid through it