darmstadtium(redirected from Ununnilium)
Also found in: Thesaurus, Medical, Acronyms, Encyclopedia.
n. Symbol Ds
An artificially produced radioactive element with atomic number 110. Isotopes having mass numbers ranging from 267 to 281 are known, with the most stable isotope (Ds-281) having a half-life of about 10 seconds. See Periodic Table.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Elements & Compounds) a synthetic radioactive element produced in small quantities by cold fusion in a linear accelerator. Symbol: Ds; atomic no: 110
[C21: named after Darmstadt, where it was discovered]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
Switch to new thesaurus
|Noun||1.||darmstadtium - a radioactive transuranic element|
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.