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Roentgenium - 2 dictionary results
roent⋅gen⋅i⋅um
[rent-gen-ee-uh
m, -jen-, ruhnt-] 
–noun Chemistry.
| a super-heavy, synthetic radioactive element. Symbol: Rg; atomic number: 111. |
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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Link To Roentgenium
roent·gen·i·um (rěnt-gěn'ē-əm, -jěn'-, rŭnt-, rɶnt-gěn'-) n. Symbol Rg An artificially produced radioactive element with atomic number 111 and a mass number of 280, whose most stable known isotope has a half-life of 3.6 seconds. See Table at element. [After Wilhelm Konrad Roentgen.] |
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Copyright © 2009, Dictionary.com, LLC. All rights reserved.
