atomic number 92 atomic number 92 /əˈtɒmɪk ˈnʌmbər ˌnaɪnti tuː/

noun

1. A heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons  ( atomic number 92 , U , uranium )
   a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons