1. 
   Selectron
   (Curitron) Machine used in internal radiotherapy treatment. Automatically puts in and takes out the radioactive source. Reduces the amount of radiation the hospital staff and visitors are exposed to as the source can be automatically taken back into the machine when someone else is in the room.
   Found op http://www.cancerhelp.org.uk/utilities/glossary/index.htm?search=s
   
   
2. 
   selectron
   (from the article `supersymmetry`) ...implies a doubling of the number of the known particles. For example, fermions such as electrons and quarks should have bosonic supersymmetric ...
   Found op http://www.britannica.com/eb/a-z/s/60
   
   
3. 
   Selectron
   A type of machine used to give radiotherapy from inside the body.
   Found op http://www.patientinfo.selcn.nhs.uk/glossary?startswith=S
   
   

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