[ has-ee-uhm ]
/ ˈhæs i əm /
noun Chemistry, Physics.
a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Hs; atomic number: 108.
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Formerly un·nil·oc·ti·um [yoo-ni-lok-tee-uhm], /ˌyu nɪˈlɒk ti əm/, el·e·ment 108 .
Origin of hassium
First recorded in 1990–95; named after Medieval Latin Hassia (the German state of Hesse, location of the institute where it was first created).
Words nearby hassium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
British Dictionary definitions for hassium
/ (ˈhæsɪəm) /
a synthetic element produced in small quantities by high-energy ion bombardment. Symbol: Hs; atomic no: 108
Word Origin for hassium
C20: from Latin, from Hesse, German state where it was discovered
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
Medical definitions for hassium
[ hä′sē-əm ]
n. Symbol Hs
A radioactive synthetic element whose longest-lived isotopes have mass numbers of 264 and 265 with half-lives of 0.08 millisecond and 2 milliseconds. Atomic number 108.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Scientific definitions for hassium
[ hä′sē-əm ]
A synthetic, radioactive element that is produced by bombarding lead with iron ions. Its known isotopes have mass numbers ranging from 263 to 277. Hs 277 has the longest confirmed half-life (16.5 minutes). Atomic number 108. See Periodic Table.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.