: 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
Recent Examples on the Web
The gummies are formulated with Vitamin C and E, collagen peptides and lemon balm, while the Hydro-Stars are made with 100 percent hydrocolloid.
—
Kaleigh Werner, Footwear News, 15 May 2026
While off-label use of some peptides shows promise for some people in certain cases, the marketing hype doesn't tell the full story.
—Teresa Maalouf, Verywell Health, 12 May 2026
Another group at risk of muscle loss is people who lose large amounts of weight in a very short amount of time—say, as a result of taking glucagonlike peptide 1 (GLP-1) drugs such as Wegovy.
—Bethany Brookshire, Scientific American, 11 May 2026
Meanwhile, allantoin, niacinamide, and the blend of peptides reduce transepidermal water loss.
—Beatrice Zocchi, Vogue, 11 May 2026
See All Example Sentences for peptide
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Kaleigh Werner, Footwear News, 15 May 2026
While off-label use of some peptides shows promise for some people in certain cases, the marketing hype doesn't tell the full story.
—Teresa Maalouf, Verywell Health, 12 May 2026
Another group at risk of muscle loss is people who lose large amounts of weight in a very short amount of time—say, as a result of taking glucagonlike peptide 1 (GLP-1) drugs such as Wegovy.
—Bethany Brookshire, Scientific American, 11 May 2026
Meanwhile, allantoin, niacinamide, and the blend of peptides reduce transepidermal water loss.
—Beatrice Zocchi, Vogue, 11 May 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 20 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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