Any waste that emits energy as rays, waves, streams or energetic particles.
Radioactive materials are often mixed with hazardous waste, from nuclear
reactors, research institutions, or hospitals.
US EPA Terms of Environment
Radioactive wastes are generally classified into two categories: high and low
High-Level Radioactive Waste (HLRW) refers to most of the
waste generated in nuclear reactors. It is a serious threat to anyone who comes
near the waste without shielding.
Low-Level Radioactive Waste (LLRW) refers to the less
hazardous waste generated by hospitals, research laboratories, and certain
Source: GreenFacts, based on US EPA Terms of Environment
Radiation - Radioactivity
To read about this term in context:
GreenFacts Summary on the Chernobyl Nuclear Accident:
Español: Residuo radiactivo
Français: Déchet radioactif