filtration

fil·tra·tion  (fl-trshn)

n.

The act or process of filtering.

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filtration  (fl-trshn)

The act or process of filtering, especially the process of passing a liquid or gas, such as air, through a filter in order to remove solid particles.

Thesaurus

Noun	1.	filtration - the process whereby fluids pass through a filter or a filtering medium natural action, natural process, action, activity - a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity" percolation, infiltration - the slow passage of a liquid through a filtering medium; "the percolation of rainwater through the soil"; "the infiltration of seawater through the lava"
	2.	filtration - the act of changing a fluid by passing it through a filter change - the action of changing something; "the change of government had no impact on the economy"; "his change on abortion cost him the election" percolation - the filtration of a liquid for extraction or purification