ଅର୍ଥ : 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.
ଉଦାହରଣ :
In the body free radicals are high-energy particles that ricochet wildly and damage cells.
ସମକକ୍ଷ : radical