English noun: free radical | |||
1. | free radical (substance) 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 | ||
Samples | In the body free radicals are high-energy particles that ricochet wildly and damage cells. | ||
Synonyms | radical | ||
Broader (hypernym) | atom | ||