• synonyms


[men-dl-ee-vee-uh m]
noun Chemistry, Physics.
  1. a transuranic element. Symbol: Md, Mv; atomic number: 101.
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Origin of mendelevium

1950–55; named after D. I. Mendeleev; see -ium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for mendelevium

Historical Examples

  • Researchers at the University of California used new techniques in forming and identifying element 101, mendelevium.

    A Brief History of Element Discovery, Synthesis, and Analysis

    Glen W. Watson

British Dictionary definitions for mendelevium


  1. a transuranic element artificially produced by bombardment of einsteinium. Symbol: Md; atomic no: 101; half-life of most stable isotope, 258 Md: 60 days (approx.); valency: 2 or 3
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Word Origin

C20: named after D. I. Mendeleyev
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for mendelevium


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

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Online Etymology Dictionary, © 2010 Douglas Harper

mendelevium in Medicine


n. Symbol Md
  1. A synthetic radioactive element; its most stable isotope is Md 258 with a half-life of 56 days. Atomic number 101.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

mendelevium in Science


  1. 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.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.