n.
Pronunciation: ˌ ə l-tr ə -fil- ' tr ā -sh ə n
Function: noun
Date: 1908
: filtration through a medium (as a semipermeable capillary wall) which allows small molecules (as of water) to pass but holds back larger ones (as of protein)
– ul · tra · fil · trate \ - ' fil- ˌ tr ā t \ noun