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didymium

 - 2 dictionary results

di⋅dym⋅i⋅um

[dahy-dim-ee-uhm, di-]
–noun Chemistry.
a mixture of neodymium and praseodymium, formerly thought to be an element. Symbol: Di

Origin:
< NL < Gk dídym(os) twin (see didymous ) + -ium; so named by Swedish chemist Carl Mosander (1797–1858), who discovered it in 1843, from its close association with lanthanum
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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di·dym·i·um   (dī-dĭm'ē-əm)   
n.  
  1. Symbol Di A metallic mixture, once considered an element, composed of neodymium and praseodymium.

  2. A mixture of rare-earth elements and oxides used chiefly in manufacturing and coloring various forms of glass.


[From Greek didumos, twin, double; see dwo- in Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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