See Also: Plutonium(medicine)
plutonium(dictionary)
plutonium(encyclopedia)
plutonium(dictionary)

plutonium (iou)



plutonium noun. L18.
[Latin Plutonium, from Greek Plouton PLUTO noun1; in sense 2 from PLUTO noun1 + -IUM, after uranium, neptunium.]
A place where there are noxious or poisonous vapours. rare. Only in L18.
Chemistry.
a. = BARIUM. Only in E19.
b. A radioactive metallic chemical element of the actinide series, atomic no. 94, which is produced artificially and is chemically similar to uranium, one isotope (plutonium-239) being fissile and used in nuclear weapons and reactors. (Symbol Pu.) M20.