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RDX

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  1. a white, crystalline, water-insoluble, powerful high explosive, C3H6N6O6, used chiefly in bombs and shells.
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Origin of RDX

1940–45; R(esearch) D(epartment) (E)x(plosive), referring to such a department in Woolwich, England
Also called cyclonite, cyclotrimethylenetrinitramine.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for rdx

RDX

abbreviation for
  1. Research Department Explosive; another name for cycloniteSee cyclonite
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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