ultrafilter

A semipermeable membrane (collodion, fish bladder, or filter paper impregnated with gels) used as a filter to separate colloids and large molecules from water and small molecules, which pass through. ... (05 Mar 2000) ...
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ultrafilter

(ul″trә-fil´tәr) the filter used in ultrafiltration.
Found on http://www.encyclo.co.uk/local/21001

ultrafilter

(from the article `metalogic`) An ultrafilter on a nonempty set is defined as a set of subsets of such that (1) the empty set does not belong to ,
Found on http://www.britannica.com/eb/a-z/u/4

Ultrafilter

In the mathematical field of set theory, an ultrafilter on a set X is a collection of subsets of X that is a filter, that cannot be enlarged (as a filter). An ultrafilter may be considered as a finitely additive measure. Then every subset of X is either considered "almost everything" (has measure 1) or "almost nothing" (has measure 0). If A is...
Found on http://en.wikipedia.org/wiki/Ultrafilter

ultrafilter

Type: Term Pronunciation: ŭl′tră-fil′tĕr Definitions: 1. A semipermeable membrane (collodion, fish bladder, or filter paper impregnated with gels) used as a filter to separate colloids and large molecules from water and small molecules, which pass through.
Found on http://www.medilexicon.com/medicaldictionary.php?t=95504
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