10. 
    radionuclide
    (ra″de-o-noo´klīd) a nuclide that disintegrates with the emission of corpuscular or electromagnetic radiations. Called also radioactive nuclide.
    Found op http://www.encyclo.co.uk/local/21001
    
    
11. 
    Radionuclide
    A radionuclide is an atom with an unstable nucleus, characterized by excess energy available to be imparted either to a newly created radiation particle within the nucleus or via to an atomic electron. During this process, the radionuclide is said to undergo radioactive decay, resulting in the emis...
    Found op http://en.wikipedia.org/wiki/Radionuclide
    
    
12. 
    Radionuclide
    A radioactive isotope of an element.
    Found op http://www.encyclo.co.uk/local/21076
    
    
13. 
    radionuclide
    radioactive nuclide
    Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=393-12-50
    
    
14. 
    radionuclide
    a radioactive nuclide
    Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=881-02-36
    
    
15. 
    radionuclide
    A radioactive nuclear species or nuclide. Of the 1,700 or so known nuclides, about 1,400 are radioactive. These radionuclides try to achieve a more stable structure by the emission of one or more different kinds of particles, including alpha particles. beta particles, or gamma rays, in the process k...
    Found op http://www.daviddarling.info/encyclopedia/R/radionuclide.html
    
    
16. 
    Radionuclide
    Radionuclides are materials that produce ionization radiation, such as X-rays, gamma rays, alpha particles, and beta particles
    Found op http://www2.slac.stanford.edu/vvc/glossary.html
    
    
17. 
    Radionuclide
    Radionuclides are materials that produce ionization radiation, such as X-rays, gamma rays, alpha particles, and beta particles
    Found op http://www2.slac.stanford.edu/vvc/glossary.html
    
    
18. 
    Radionuclide
    Radioactive atoms that are used to make a tracer signal that is picked up in a bone scan
    Found op http://www.patientinfo.selcn.nhs.uk/glossary?startswith=R
    
    
19. 
    Radionuclide
    A radionuclide is a type of Nuclide which is Radioactive and will undergo spontaneous Radioactive Decay.
    Found op http://www.ionactive.co.uk/glossary_atoz.html?s=az&t=r
    
    
20. 
    radionuclide
    An unstable form of a chemical element that releases radiation as it breaks down and becomes more stable. Radionuclides may occur in nature or be made in a laboratory. In medicine, they are used in imaging tests and in treatment. Also called radioisotope.
    Found op http://www.cancer.gov/dictionary?expand=R
    
    
21. 
    Radionuclide
    an unstable and therefore radioactive form of a nuclide.
    Found op http://www.bt.cdc.gov/radiation/glossary.asp
    
    

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