ˌ ̷ ̷ ̷ ̷ˈlāshən noun
( -s )
Etymology: Latin percolation-, percolatio, from percolatus + -ion-, -io -ion
1.
a. : the slow passage of a liquid through a filtering medium : leaching , seepage
percolation of water downward through the soil — Russell Lord
b. : a method of extraction or purification by means of filtration
decolorization of lubricating oils by percolation
c. : the process of brewing coffee by causing hot water to pass through it in a percolator
d. : the process of extracting the soluble constituents of a powdered drug by passage of a liquid through it
2. : diffusion by gradual spreading or penetration
a gradual percolation of Scandinavian motives into sculpture — O. Elfrida Saunders
the percolation downward through the whole middle class of the sense of freedom — Roy Lewis & Angus Maude