filtration

nouns

the process whereby fluids pass through a filter or a filtering medium
is derived from
is derived from
is a type of (narrower)
a process existing in or produced by nature (rather than by the intent of human beings)
"the action of natural forces"; "volcanic activity"
the act of changing a fluid by passing it through a filter
is derived from
is derived from
is a type of (narrower)
the action of changing something
"the change of government had no impact on the economy"; "his change on abortion cost him the election"