: 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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Casein and whey proteins work with milk's carbohydrates and fats to provide feelings of fullness, while bioactive peptides can regulate appetite hormones.
—
Randi Gollin, Martha Stewart, 3 May 2026
Costs can be high because peptides are often custom-made and must meet strict quality and sterility standards.
—Angelica Stabile, FOXNews.com, 1 May 2026
Kennedy is pushing the FDA to reclassify 12 of the 19 restricted peptides, which would allow US companies—like Enhanced—to compound and sell them through legitimate domestic channels.
—Clara Molot, Vanity Fair, 30 Apr. 2026
Designed with mature lips in mind, the waterproof texture doesn’t just sit on the surface; it’s infused with peptides and vitamin E to minimize fine lines and lock in hydration.
—Micaela English, Glamour, 30 Apr. 2026
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Randi Gollin, Martha Stewart, 3 May 2026
Costs can be high because peptides are often custom-made and must meet strict quality and sterility standards.
—Angelica Stabile, FOXNews.com, 1 May 2026
Kennedy is pushing the FDA to reclassify 12 of the 19 restricted peptides, which would allow US companies—like Enhanced—to compound and sell them through legitimate domestic channels.
—Clara Molot, Vanity Fair, 30 Apr. 2026
Designed with mature lips in mind, the waterproof texture doesn’t just sit on the surface; it’s infused with peptides and vitamin E to minimize fine lines and lock in hydration.
—Micaela English, Glamour, 30 Apr. 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 5 May. 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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