Contamination 18 : The deposition of unwanted radioactive material (usually in an easily removable form) on the surfaces of structures, areas, objects, or personnel
Jefferson Lab, Radiation Worker Glossary, Newport News, VA, USA 2007. http://www.jlab.org/div_dept/train/rad_guide/gloss ary.html, (Rad Sfty, Prot and Cont - Amer) {1005}