fermium

 : 
Noun
 : 
fer=mi=um

WORDNET DICTIONARY

Noun fermium has 1 sense

CIDE DICTIONARY

fermiumn. 
     the transuranic element of atomic number 100; symbol Fm. The atomic weight of the most stable isotope, having a half-life of about 80 days, is 257. The first isotope, Fm255 was discovered in 1952 in the debris of a thermonuclear explosion. Other istopes have been produced in nuclear reactors and by decay of other transuranic elements.  [WordNet 1.5]

OXFORD DICTIONARY

fermium, n. Chem. a transuranic radioactive metallic element produced artificially.

Usage
Symb.: Fm.
Etymology
as FERMI + -IUM

For further exploring for "fermium" in Webster Dictionary Online


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