free radical

Noun
  1. An atom or group of atoms with at least one unpaired electron;
    In the body it is usually an oxygen molecule that has lost an electron and will stabilize itself by stealing an electron from a nearby molecule (synset 114898347)
    "in the body free radicals are high-energy particles that ricochet wildly and damage cells"
    is a type of: atom - (physics and chemistry) the smallest component of an element having the chemical properties of the element
    same as: radical

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