transactinide element

[trans-ak-tuh-nahyd, tranz-]

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.

Nearby words

  1. trans.,
  2. transacetylase,
  3. transacetylation,
  4. transact,
  5. transactinide,
  6. transactinide elements,
  7. transaction,
  8. transactional analysis,
  9. transactivate,
  10. transacylase


Origin of transactinide element

First recorded in 1965–70; trans- + actinide

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019


British Dictionary definitions for transactinide

transactinide

noun

any artificially produced element with an atomic number greater than 103

Word Origin for transactinide

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