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nuclear fuel

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noun
  1. Physics. fissile or fertile material that undergoes fission in a nuclear reactor.
  2. any light element, as hydrogen or helium, that undergoes fusion and gives off energy within the interior of stars.
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Origin of nuclear fuel

First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for nuclear fuel

nuclear fuel

noun
  1. a fuel that provides nuclear energy, used in nuclear power stations, nuclear submarines, etc
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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