1. a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons; [syn: uranium, U, atomic number 92]
WordNet (r) 3.0 (2006):
atomic number 92
n 1: a heavy toxic silvery-white radioactive metallic element;
occurs in many isotopes; used for nuclear fuels and nuclear
weapons [syn: uranium, U, atomic number 92]