[dahy-dim-ee-uh m, di-]
- a mixture of neodymium and praseodymium, formerly thought to be an element. Symbol: Di
Origin of didymium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for didymium
Neodymium (Nd) forms the chief portion of the old “didymium.”
It suggests a didymium in its form and habit, but is near a badhamia.
The internal structure is essentially that of Diderma or Didymium.
This induced Schrader to throw all the didermas into his new genus, Didymium.
The spores of Didymium crustaceum were sown upon a heap of leaves in autumn.
- a mixture of the metallic rare earths neodymium and praseodymium, once thought to be an element
- a mixture of rare earths and their oxides used in colouring glass
C19: from New Latin, from Greek didumos twin + -ium
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