: 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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Peace Out Wrinkles Microneedling Patches were our best overall pick for their ease of application and ability to deliver retinol, vitamin C, and peptides into skin thanks to 450 dissolving microneedles.
—
Brigitt Earley, Glamour, 10 July 2025
Compounds like lactic acid and antimicrobial peptides can inhibit the growth of disease-causing bacteria and viruses.12 Some postbiotics may also boost the production of mucins—protective substances that coat your gut lining.
—Patricia Weiser, Verywell Health, 30 June 2025
Opt for a protein source, such as Greek yogurt, peanut butter, or a scoop of collagen peptides.
—Jillian Kubala, Health, 24 June 2025
Barrier repair creams with ceramides, cholesterol or fatty acids, or formulas with peptide and growth factor will also aid in skin nourishment and renewal.
—Starr Bowenbank, People.com, 22 June 2025
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Brigitt Earley, Glamour, 10 July 2025
Compounds like lactic acid and antimicrobial peptides can inhibit the growth of disease-causing bacteria and viruses.12 Some postbiotics may also boost the production of mucins—protective substances that coat your gut lining.
—Patricia Weiser, Verywell Health, 30 June 2025
Opt for a protein source, such as Greek yogurt, peanut butter, or a scoop of collagen peptides.
—Jillian Kubala, Health, 24 June 2025
Barrier repair creams with ceramides, cholesterol or fatty acids, or formulas with peptide and growth factor will also aid in skin nourishment and renewal.
—Starr Bowenbank, People.com, 22 June 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 16 Jul. 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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