Free Radical (Noun)
Meaning
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".
Classification
Nouns denoting substances.
Examples
- Free radicals are unstable molecules that can cause oxidative stress and damage to cells and tissues in the body.
- Antioxidants, such as vitamins C and E, help to neutralize free radicals by donating an electron to stabilize them.
- When a free radical steals an electron from a nearby molecule, it can trigger a chain reaction of oxidative damage.
- Exposure to pollution, UV radiation, and cigarette smoke can increase the production of free radicals in the body.
- The antioxidants in fruits and vegetables can help to mop up free radicals and protect against chronic diseases such as cancer and heart disease.