ultrafilter

[ uhl-truh-fil-ter ]
/ ˌʌl trəˈfɪl tər /

noun

Physical Chemistry. a filter for purifying sols, having a membrane with pores sufficiently small to prevent the passage of the suspended particles.
Mathematics. a filter in a topological space, having the property that no other filter exists in the space having among its subsets all the subsets in the given filter.

verb (used with object)

Physical Chemistry. to purify by means of an ultrafilter.

Origin of ultrafilter

ultra- + filter

OTHER WORDS FROM ultrafilter

ul·tra·fil·tra·tion [uhl-truh-fil-trey-shuh n] /ˌʌl trə fɪlˈtreɪ ʃən/, noun

Words nearby ultrafilter

ultracrepidarian, ultracritical, ultradian, ultrafast, ultrafiche, ultrafilter, ultrafiltrate, ultrafiltration, ultrahigh, ultrahigh frequency, ultraism

Example sentences from the Web for ultrafiltration

British Dictionary definitions for ultrafiltration

ultrafilter
/ (ˌʌltrəˈfɪltə) /

noun

a filter with small pores used to separate very small particles from a suspension or colloidal solution

Derived forms of ultrafilter

ultrafiltration (ˌʌltrəfɪlˈtreɪʃən), noun

Medical definitions for ultrafiltration

ultrafiltration
[ ŭl′trə-fĭl-trā′shən ]

n.

The filtration of a colloidal substance through a semipermeable medium that allows only small molecules through.