: 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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Infused with amino peptides to firm and smooth the skin, niacinamide to nourish the skin barrier, and hyaluronic acid for a plumping touch, Olay’s lifting cream offers moisture with an extra dose of rejuvenating benefits.
—
Jenny Berg, Vogue, 4 Sep. 2025
This milky, creamy formula is packed with peptides and ceramides to help reinforce the skin barrier and plump the skin.
—Esme Benjamin, PEOPLE, 4 Sep. 2025
While some peptide therapies are well established, such as insulin, for example, others are newer and not yet regulated by the FDA.
—Michelle Stansbury, Forbes.com, 2 Sep. 2025
To further support strength, the formula layers in a complex of 10 hydrolyzed plant proteins, 17 amino acids, and eight peptides, which work together to repair weak areas and boost elasticity while enveloping your hair in an uplifting citrus blend softened by lavender and geranium.
—Jailynn Taylor, Allure, 1 Sep. 2025
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Jenny Berg, Vogue, 4 Sep. 2025
This milky, creamy formula is packed with peptides and ceramides to help reinforce the skin barrier and plump the skin.
—Esme Benjamin, PEOPLE, 4 Sep. 2025
While some peptide therapies are well established, such as insulin, for example, others are newer and not yet regulated by the FDA.
—Michelle Stansbury, Forbes.com, 2 Sep. 2025
To further support strength, the formula layers in a complex of 10 hydrolyzed plant proteins, 17 amino acids, and eight peptides, which work together to repair weak areas and boost elasticity while enveloping your hair in an uplifting citrus blend softened by lavender and geranium.
—Jailynn Taylor, Allure, 1 Sep. 2025
See All Example Sentences for peptide
Cite this Entry
“Peptide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/peptide. Accessed 9 Sep. 2025.
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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