Found 2 items, similar to fermium.
English → English (WordNet) Definition: fermium fermium n : a radioactive transuranic metallic element produced by bombarding plutonium with neutrons [syn: Fm, atomic number 100 ]
English → English (gcide) Definition: fermium fermium \fermium\ n. 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. --Handb. Ch. Phys. 61. Syn: Fm. [WordNet 1.5]