nuclear fuel

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.

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
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