fermium

fer·mi·um  (fûrm-m, fr-)

n. Symbol Fm

A synthetic transuranic metallic element (atomic number 100) having 10 isotopes with mass numbers ranging from 248 to 257 and corresponding half-lives ranging from 0.6 minutes to approximately 100 days. See Table at element.

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[After Enrico Fermi.]

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fermium

Noun

Chem an element artificially produced by neutron bombardment of plutonium Symbol: Fm[after Enrico Fermi, physicist]

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fermium  (fûrm-m)

Symbol Fm

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.

Thesaurus

Noun

1.

fermium - a radioactive transuranic metallic element produced by bombarding plutonium with neutrons atomic number 100, Fm metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.