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dbx

British  

noun

  1. electronics a noise-reduction system that works as a compander across the full frequency spectrum

"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

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In this sense the term DDT is now archaic, having been widely displaced by `debugger' or names of individual programs like adb, sdb, dbx, or gdb.

From The Jargon File, Version 4.2.2, 20 Aug 2000 by Steele, Guy L.