free radical

Other Definitions
free radical (enc)

Noun

free radical - an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule than has lost an electron and will stabilize itself by stealing an electron from a nearby molecule; "in the body free radicals are high-energy particles that ricochet wildly and damage cells"

radical

atom - (physics and chemistry) the smallest component of an element having the chemical properties of the element

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