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n. Symbol Uuq
An artificially produced radioactive element with atomic number 114 whose most stable isotope has a mass number of 289 with a half-life of approximately 2.7 seconds. Radioactive decay of all isotopes is chiefly by alpha-particle emission. Also called ununquadium. 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.
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|Noun||1.||element 114 - a radioactive transuranic element|
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