copernicium
Americannoun
-
Symbol Cn A synthetic radioactive element that has only been produced in trace amounts. The most stable isotope has a mass number of 285 and a half-life of about 34 seconds. Atomic number 112.
-
See Periodic Table
Etymology
Origin of copernicium
First recorded in 1005–10; named after Polish astronomer Nicolaus Copernicus.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Group 12 contains the four elements zinc, cadmium, mercury, and copernicium.
From Textbooks • Feb. 14, 2019
The radioactive elements copernicium, flerovium, polonium, and livermorium are also metals but are beyond the scope of this chapter.
From Textbooks • Feb. 14, 2019
There are a few of those this time around: copernicium among them.
From Seattle Times • Aug. 13, 2012
Element 112 was named copernicium in honor of astronomer Nicolaus Copernicus.
From New York Times • Jun. 8, 2011
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
