Dictionary.com
definitions
  • synonyms

transactinide element

[trans-ak-tuh-nahyd, tranz-]
See more synonyms on Thesaurus.com
noun Chemistry, Physics.
  1. 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.

Origin of transactinide element

First recorded in 1965–70; trans- + actinide
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for transactinide

transactinide

noun
  1. 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