follow Dictionary.com

Today's Word of the Day means...

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
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
Examples for ultrafilter
  • The paint collected in the water is removed by skimming or by use of an ultrafilter and the water is reused in the curtain.
  • Iodine was retained to a considerable degree by the ultrafilter.
British Dictionary definitions for ultrafilter

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
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source

Word of The Day

Difficulty index for ultrafilter

Few English speakers likely know this word

Word Value for ultrafilter

0
0
Scrabble Words With Friends