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[men-dl-ee-vee-uh m] /ˌmɛn dlˈi vi əm/
noun, Chemistry, Physics.
a transuranic element. Symbol: Md, Mv; atomic number: 101.
1950-55; named after D. I. Mendeleev; see -ium Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for mendelevium


a transuranic element artificially produced by bombardment of einsteinium. Symbol: Md; atomic no: 101; half-life of most stable isotope, 258Md: 60 days (approx.); valency: 2 or 3
Word Origin
C20: named after D. I. Mendeleyev
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for mendelevium

1955, Modern Latin, in honor of Dmitri Ivanovich Mendeleev.

Online Etymology Dictionary, © 2010 Douglas Harper
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mendelevium in Medicine

mendelevium men·de·le·vi·um (měn'də-lē'vē-əm)
Symbol Md
A synthetic radioactive element; its most stable isotope is Md 258 with a half-life of 56 days. Atomic number 101.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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mendelevium in Science
Symbol Md
A synthetic, radioactive metallic element of the actinide series that is produced by bombarding einsteinium with helium ions. Its most stable isotope is Md 258 with a half-life of approximately 51.5 days. Atomic number 101. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for mendelevium


synthetic chemical element of the actinoid series of the periodic table, atomic number 101. It was the first element to be synthesized and discovered one atom at a time. Not occurring in nature, mendelevium (as the isotope mendelevium-256) was discovered (1955) by Albert Ghiorso, Bernard G. Harvey, Gregory R. Choppin, Stanley G. Thompson, and Glenn T. Seaborg at the University of California, Berkeley, as a product resulting from the helium-ion bombardment of a minute quantity (1,000,000,000 atoms) of einsteinium-253 (atomic number 99).

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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