| 单词 | ultrafilter |
| 释义 | ultrafilter[ uhl-truh-fil-ter ] / ˌʌl trəˈfɪl tər / nounPhysical 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 ultrafilterultra- + filter OTHER WORDS FROM ultrafilterul·tra·fil·tra·tion [uhl-truh-fil-trey-shuhn], /ˌʌl trə fɪlˈtreɪ ʃən/, nounWords nearby ultrafilterultracritical, ultradian, ultra-distance, ultrafast, ultrafiche, ultrafilter, ultrafiltrate, ultra filtration, ultrahigh, ultrahigh frequency, ultraism Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for ultrafilterultrafilter / (ˌʌltrəˈfɪltə) / nouna filter with small pores used to separate very small particles from a suspension or colloidal solution Derived forms of ultrafilterultrafiltration (ˌʌltrəfɪlˈtreɪʃən), nounCollins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 |
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