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ultrafilter

[uhl-truh-fil-ter] /ˌʌl trəˈfɪl tər/
noun
1.
Physical Chemistry. a filter for purifying sols, having a membrane with pores sufficiently small to prevent the passage of the suspended particles.
2.
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)
3.
Physical Chemistry. to purify by means of an ultrafilter.
Origin
Related forms
ultrafiltration
[uhl-truh-fil-trey-shuh n] /ˌʌl trə fɪlˈtreɪ ʃən/ (Show IPA),
noun
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ultra filtration

ultra filtration

noun
1.
(engineering) filtration that removes particles less than 10 microns (10–6m) in diameter

ultrafilter

/ˌʌltrəˈfɪltə/
noun
1.
a filter with small pores used to separate very small particles from a suspension or colloidal solution
Derived Forms
ultrafiltration (ˌʌltrəfɪlˈtreɪʃən) noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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