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fuel rod

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noun Energy.
  1. nuclear fuel contained in a long thin-walled tube, an array of such tubes forming the core of a nuclear reactor.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for fuel rod

fuel rod

noun
  1. a long tube, often made of a zirconium alloy and containing uranium-oxide pellets, that is stacked in bundles of about 200 to provide the fuel in certain types of nuclear reactor
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