push broom: a wide broom that is pushed ahead of the sweeper
broom: a cleaning implement for sweeping; bundle of straws or twigs attached to a long handle
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