W: (n) percolation [Related to: percolate] (the slow passage of a liquid through a filtering medium) "the percolation of rainwater through the soil"; "the infiltration of seawater through the lava"
W: (adj) permeant [Related to: permeate] (spreading or spread throughout) "armed with permeative irony...he punctures affectations"; "the pervasive odor of garlic"; "an error is pervasive if it is material to more than one conclusion"
W: (n) permeation [Related to: permeate] (the process of permeating or infusing something with a substance)
W: (n) filtration [Related to: filter] (the process whereby fluids pass through a filter or a filtering medium)
W: (n) filtration [Related to: filter] (the act of changing a fluid by passing it through a filter)