- filtration - the process whereby fluids pass through a filter or a filtering medium
--1 is a kind of natural process, natural action, action, activity
--1 has particulars: percolation, infiltrationDerived forms: verb filter2, verb filter1 - filtration - the act of changing a fluid by passing it through a filter
--2 is a kind of change
--2 has particulars: percolationDerived forms: verb filter2, verb filter1