free radical
noun
: an especially reactive atom or group of atoms that has one or more unpaired electrons
especially
: one that is produced in the body by natural biological processes or introduced from an outside source (such as tobacco smoke, toxins, or pollutants) and that can damage cells, proteins, and DNA by altering their chemical structure
Examples of free radical in a Sentence
Recent Examples on the Web
Available in 15 colors, the formula contains antioxidant vitamin C to prevent free radical damage, and features a convenient sponge applicator for smooth, precise application.
—
Tanya Sharma,
InStyle,
4 July 2026
Antioxidants work in the body to stabilize free radicals, which are highly reactive molecules that can damage cells and lead to inflammation throughout the body.
—
Angelica Bottaro,
Verywell Health,
1 July 2026
Antioxidants help balance free radicals, which may limit inflammation linked to joint pain and cartilage damage.
—
Caitlin Beale,
Health,
29 June 2026
Formulated with skin-nourishing ingredients like vitamin C, ceramides, hyaluronic acid, and vitamin B5, the serum reduces signs of aging and supports collagen production, evens your skin complexion, and defends against free radicals.
—
Alicia Geigel,
Southern Living,
21 June 2026
See All Example Sentences for free radical
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Tanya Sharma,
InStyle,
4 July 2026
Antioxidants work in the body to stabilize free radicals, which are highly reactive molecules that can damage cells and lead to inflammation throughout the body.
—
Angelica Bottaro,
Verywell Health,
1 July 2026
Antioxidants help balance free radicals, which may limit inflammation linked to joint pain and cartilage damage.
—
Caitlin Beale,
Health,
29 June 2026
Formulated with skin-nourishing ingredients like vitamin C, ceramides, hyaluronic acid, and vitamin B5, the serum reduces signs of aging and supports collagen production, evens your skin complexion, and defends against free radicals.
—
Alicia Geigel,
Southern Living,
21 June 2026
See All Example Sentences for free radical
Cite this Entry
“Free radical.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/free%20radical. Accessed 5 Jul. 2026.
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