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fermium

(fer′mē əm, fʉr′-)

☆

noun

a radioactive, metallic chemical element, one of the actinides, produced by intense neutron bombardment of plutonium, as in a cyclotron: symbol, Fm; at. no., 100

Origin: ModL: so named (1955) by A. Ghiorso and co-workers, after Enrico Fermi (in honor of his studies in nuclear physics) + -ium

See fermium in American Heritage Dictionary 4

noun 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.

Origin:

Origin: After Enrico Fermi

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