magnox

noun
  1. an alloy consisting mostly of magnesium with small amounts of aluminium and other metals, used in fuel elements of nuclear reactors

Word Origin for magnox

C20: from mag (nesium) n (o) ox (idation)
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