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transactinide element

[trans-ak-tuh-nahyd, tranz-] /trænsˈæk təˌnaɪd, trænz-/
noun, Chemistry, Physics.
any element having an atomic number higher than 103, the last of the actinide series. These superheavy, radioactive elements are extremely short-lived, and can only be created in the laboratory.
1965-70; trans- + actinide Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for transactinide
  • Liquid-liquid extraction chemistry has proved successful in overcoming the difficulties presented by transactinide research.
  • We will also have minimal discussion of compounds of the transactinide elements in this chapter.
  • Summary of the reactions and methods used in the discovery of the actinide and transactinide elements.
British Dictionary definitions for transactinide


any artificially produced element with an atomic number greater than 103
Word Origin
C20: from trans- + actinide
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
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