: 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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Another peptide, hexapeptide-11, steps in as a protective shield, slowing the breakdown of your natural HA so those moisture levels stay high over time.
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Christa Joanna Lee, Allure, 30 Oct. 2025
Olay Regenerist Micro-Sculpting Cream The cream is formulated with skin-nourishing ingredients, like niacinamide to brighten the skin and strengthen its moisture barrier, amino peptides to firm and sculpt, and hydrating hyaluronic acid to plump fine lines and wrinkles.
—Alicia Geigel, Southern Living, 29 Oct. 2025
Collagen peptides are among the most versatile protein sources, as they can be mixed into hot and cold beverages, baked goods, oatmeal, and smoothies.
—Jillian Kubala, Health, 29 Oct. 2025
The masks use a form of collagen peptides—a buzzy skincare ingredient beloved for its anti-ageing properties as well as hydrating hyaluronic acid and skin barrier supporting niacinamide.
—Ellie Davis, Vogue, 28 Oct. 2025
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Christa Joanna Lee, Allure, 30 Oct. 2025
Olay Regenerist Micro-Sculpting Cream The cream is formulated with skin-nourishing ingredients, like niacinamide to brighten the skin and strengthen its moisture barrier, amino peptides to firm and sculpt, and hydrating hyaluronic acid to plump fine lines and wrinkles.
—Alicia Geigel, Southern Living, 29 Oct. 2025
Collagen peptides are among the most versatile protein sources, as they can be mixed into hot and cold beverages, baked goods, oatmeal, and smoothies.
—Jillian Kubala, Health, 29 Oct. 2025
The masks use a form of collagen peptides—a buzzy skincare ingredient beloved for its anti-ageing properties as well as hydrating hyaluronic acid and skin barrier supporting niacinamide.
—Ellie Davis, Vogue, 28 Oct. 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 3 Nov. 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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