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microfilter

British  
/ ˈmaɪkrəʊˌfɪltə /

noun

  1. a device plugged into a phone socket to separate the phone line from the broadband line

"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

Example Sentences

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But in claiming the average hiker or camper needs a $99.95 microfilter pump to avoid illness and death, they far exceed the conclusions of a scant medical literature.

From Slate • Feb. 1, 2018