: 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 formula also features four peptides to treat the eye area from multiple angles—helping signal collagen production, improve elasticity, and smooth the look of fine lines—while collagen reinforces skin’s bounce.
—
Christa Joanna Lee, Allure, 22 Mar. 2026
The findings suggest that DNP peptides could serve as flexible, adaptable platforms for delivering large-molecule drugs by mouth, the authors concluded in the study abstract.
—Angelica Stabile, FOXNews.com, 20 Mar. 2026
That’s thanks to a blend of hyaluronic acid, peptides, niacinamide, and marula oil.
—Conçetta Ciarlo, Vogue, 20 Mar. 2026
More than a body moisturizer, Crepe Control Tightening Body Cream is a transforming treatment, packed with peptides plus lifting and brightening agents to visibly tighten and even skin tone.
—Tory Johnson, ABC News, 19 Mar. 2026
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Christa Joanna Lee, Allure, 22 Mar. 2026
The findings suggest that DNP peptides could serve as flexible, adaptable platforms for delivering large-molecule drugs by mouth, the authors concluded in the study abstract.
—Angelica Stabile, FOXNews.com, 20 Mar. 2026
That’s thanks to a blend of hyaluronic acid, peptides, niacinamide, and marula oil.
—Conçetta Ciarlo, Vogue, 20 Mar. 2026
More than a body moisturizer, Crepe Control Tightening Body Cream is a transforming treatment, packed with peptides plus lifting and brightening agents to visibly tighten and even skin tone.
—Tory Johnson, ABC News, 19 Mar. 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 25 Mar. 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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