Dictionary.com
definitions

ununquadium

[uhn-uh n-kwah-dee-uh m]
noun Chemistry, Physics.
  1. former name of flerovium. Symbol: Uuq
Also called element 114.

element 114

noun Chemistry, Physics.
  1. flerovium.
Formerly ununquadium.

flerovium

[flai-roh-vee-uh m]
noun Chemistry, Physics.
  1. a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Fl; atomic number: 114.

Origin of flerovium

named after Flerov Laboratory of Nuclear Reactions in Russia, cofounded by Georgi N. Flerov, 1913–90, Russian physicist; see -ium
Formerly ununquadium, element 114.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
ununquadium in Science

ununquadium

[ə-nŭn′kwŏd′ē-əm]
Uuq
  1. See element 114.

element 114

Uuq
  1. An artificially produced radioactive element whose most stable isotope has a mass number of 289 and a half-life of approximately 2.7 seconds. Radioactive decay of all isotopes is chiefly by alpha-particle transmission. Also called ununquadium See Periodic Table.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.