unniloctium

[ yoo-ni-lok-tee-uh m ]
/ ˌyu nɪˈlɒk ti əm /

noun Chemistry, Physics.

former name of hassium. Symbol: Uno

Nearby words

  1. unneeded,
  2. unnerve,
  3. unnerving,
  4. unnilennium,
  5. unnilhexium,
  6. unnilpentium,
  7. unnilquadium,
  8. unnilseptium,
  9. unnoticeable,
  10. unnoticed

Also called element 108.

hassium

[ has-ee-uh m ]
/ ˈhæs i əm /

noun Chemistry, Physics.

a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Hs; atomic number: 108.

Origin of hassium

after Medieval Latin Hassia (the German state of Hesse, location of the institute where it was first created); see -ium

Formerly unniloctium, element 108.

element 108

noun Chemistry, Physics.

Formerly unniloctium.

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


British Dictionary definitions for unniloctium

hassium

/ (ˈhæsɪəm) /

noun

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

Science definitions for unniloctium

hassium

[ häsē-əm ]

Hs

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.