pu

Noun pu has 1 sense

• pu(n = noun.substance) atomic number 94, plutonium - a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons; found in minute quantities in uranium ores but is usually synthesized in nuclear reactors; 13 isotopes are known with the most important being plutonium 239;
is a kind of chemical element, element
has particulars: plutonium 239