ABC - DEF - GHI - JKL - MNO - PQRS - TUV - WXYZ Radioactive material
Definition:
Material that contains unstable (radioactive) atoms that give off [ionizing]
radiation as they decay.
Source & ©:
CDC
Glossary of Radiological Terms
Related words: Caesium - Iodine - Radiation - Radioactivity - Strontium-90 To read about this term in context: GreenFacts Digest on the Chernobyl Nuclear Accident:
ABC - DEF - GHI - JKL - MNO - PQRS - TUV - WXYZ | 
