fermium

[ fur-mee-uhm ]

noun

, Chemistry, Physics.

1. a transuranic element. : Fm; : 100.

fermium

/ ˈfɜːmɪəm /

noun

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

fermium

/ fûr′mē-əm /

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.
2. See Periodic Table

Word History and Origins

Origin of fermium¹

1950–55; named after E. Fermi; -ium

Word History and Origins

Origin of fermium¹

C20: named after Enrico Fermi

Example Sentences

Even after that it could be stopped, provided one had a way to get rid of the violently fissioning fermium.

From Project Gutenberg

He should have known automatically that it was building toward Fermium 256.

From Project Gutenberg