Definition of "didymium" []

• A metallic mixture, once considered an element, composed of neodymium and praseodymium. (noun)
• A mixture of rare-earth elements and oxides used chiefly in manufacturing and coloring various forms of glass. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The word didymium comes from a Greek word meaning "twin," because it was closely associated with the element lanthanium, both of which were found with cerium."
• "Instead it is targeting the mixture—also known as didymium—that is crucial in making magnets."
• "Elemental Attraction didymium Yet it didn't pledge to underpin all rare-earth prices."