Dictionary.com
definitions

fermium

[fur-mee-uh m]
noun Chemistry, Physics.
  1. a transuranic element. Symbol: Fm; atomic number: 100.

Origin of fermium

1950–55; named after E. Fermi; see -ium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for fermium

fermium

noun
  1. a transuranic element artificially produced by neutron bombardment of plutonium. Symbol: Fm; atomic no: 100; half-life of most stable isotope, 257 Fm: 80 days (approx.)

Word Origin for fermium

C20: named after Enrico Fermi
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 fermium

Fermium

n.

discovered in the debris of a 1952 U.S. nuclear test in the Pacific, named 1955 for Italian-born U.S. physicist Enrico Fermi (1901-1954).

Online Etymology Dictionary, © 2010 Douglas Harper
fermium in Medicine

fermium

[fûr′mē-əm, fĕr′-]
n. Symbol Fm
  1. A synthetic radioactive metallic element whose most stable isotope is Fm 257 with a half-life of approximately 100 days. Atomic number 100.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
fermium in Science

fermium

[fûr′mē-əm]
Fm
  1. A synthetic, radioactive metallic element of the actinide series that is produced from plutonium or uranium. Its most stable isotope is Fm 257 with a half-life of approximately 100 days. Atomic number 100. See Periodic Table.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.