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free radical
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free radical

It beats hell out of free radicals.
J.D. Robb  --  Immortal in Death
  an atom or molecule with at least one unpaired electron in the outermost shell (valence)
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free radicals free radical
In the body, a free radical is usually an oxygen molecule than has lost an electron (through oxidation). The free radical will stabilize itself by stealing an electron from a nearby molecule - often damaging the impacted molecule; e.g., DNA or lipid molecules.
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Associated words [difficulty]:   free radical [9] , ion [4] , polymer [6] , isotope [7] , atomic number [8] , cation [8]
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Most commonly used in these subjects:   Science, Medicine, Engineering
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