: any of various amides that are derived from two or more amino acids by combination of the amino group of one acid with the carboxyl group of another and are usually obtained by partial hydrolysis of proteins
Examples of peptide in a Sentence
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The TikTok Shop best-selling brand brought back three of its most viral (sold-out) peptide lip treatments as in-store exclusives to drive foot traffic.
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Danielle Directo-Meston, HollywoodReporter, 20 June 2026
Barrier-supporting ingredients like panthenol, ceramides, allantoin, aloe, and jojoba oil soothe and lock in moisture, while peptides and adenosine promote smoother, healthier-looking skin.
—Christa Joanna Lee, Allure, 19 June 2026
Niacinamide and vitamin E work to strengthen, vitamin C brightens, AHA exfoliates and smooths, and collagen peptides help reduce the appearance of fine lines while boosting elasticity.
—Claudia Fisher, Parents, 18 June 2026
Actually Said About Peptides Speaking on Rogan’s podcast in late February, Kennedy said about 14 of the 19 peptides moved to Category 2, the FDA’s restricted compounding status, in late 2023 would shift back to Category 1, restoring a legal compounding pathway by prescription.
—Allison Palmer, Charlotte Observer, 17 June 2026
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Danielle Directo-Meston, HollywoodReporter, 20 June 2026
Barrier-supporting ingredients like panthenol, ceramides, allantoin, aloe, and jojoba oil soothe and lock in moisture, while peptides and adenosine promote smoother, healthier-looking skin.
—Christa Joanna Lee, Allure, 19 June 2026
Niacinamide and vitamin E work to strengthen, vitamin C brightens, AHA exfoliates and smooths, and collagen peptides help reduce the appearance of fine lines while boosting elasticity.
—Claudia Fisher, Parents, 18 June 2026
Actually Said About Peptides Speaking on Rogan’s podcast in late February, Kennedy said about 14 of the 19 peptides moved to Category 2, the FDA’s restricted compounding status, in late 2023 would shift back to Category 1, restoring a legal compounding pathway by prescription.
—Allison Palmer, Charlotte Observer, 17 June 2026
See All Example Sentences for peptide
Cite this Entry
“Peptide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/peptide. Accessed 24 Jun. 2026.
Copy CitationKids Definition
peptide
noun
pep·tide
ˈpep-ˌtīd 
: any of various substances that are usually obtained by the partial breakdown of proteins
Medical Definition
peptide
noun
pep·tide
ˈpep-ˌtīd
: any of various amides that are derived from two or more amino acids by combination of the amino group of one acid with the carboxyl group of another and are usually obtained by partial hydrolysis of proteins
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