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didymium

[dahy-dim-ee-uh m, di-] /daɪˈdɪm i əm, dɪ-/
noun, Chemistry
1.
a mixture of neodymium and praseodymium, formerly thought to be an element. Symbol: Di.
Origin
< Neo-Latin < Greek 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. 2014.
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Examples for didymium
  • He named the element didymium, as it was an inseparable twin brother of lanthanum.
British Dictionary definitions for didymium

didymium

/daɪˈdɪmɪəm; dɪ-/
noun
1.
a mixture of the metallic rare earths neodymium and praseodymium, once thought to be an element
2.
a mixture of rare earths and their oxides used in colouring glass
Word Origin
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
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Word Value for didymium

17
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