filtration
fil·tra·tion
noun \fil-ˈtrā-shən\Definition of FILTRATION
1
: the process of filtering
2
: the process of passing through or as if through a filter; also : diffusion <the kidney produces urine by filtration>
Learn More About
Seen & Heard 
What made you want to look up filtration? Please tell us where you read or heard it (including the quote, if possible).
