Search Result：free radical
free radical 
(TTS Sound)
(TTS Sound)Overview of noun free_radical
The noun free radical has 1 sense
- free radical, radical -- (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; "in the body free radicals are high-energy particles that ricochet wildly and damage cells")