: 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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These are combined with an intelligent mix of peptides, caffeine, hyaluronic acid, and squalane into a gel-like serum applied to the skin with a cooling, rollerball applicator.
—
Kiana Murden, Vogue, 19 Sep. 2025
It’s made with peptides, known to immediately make lashes appear thicker and healthier.
—Jacqueline Tempera, PEOPLE, 19 Sep. 2025
At the beginning of the trial and after 12, 24 and 48 weeks, researchers measured participants' C-peptide levels (a marker of insulin secretion) to find out how much insulin participants could make themselves.
—Hannah Millington, MSNBC Newsweek, 18 Sep. 2025
Unlike Novo Nordisk's oral semaglutide, Eli Lilly's pill is not a peptide medication.
—Annika Kim Constantino, CNBC, 17 Sep. 2025
See All Example Sentences for peptide
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Kiana Murden, Vogue, 19 Sep. 2025
It’s made with peptides, known to immediately make lashes appear thicker and healthier.
—Jacqueline Tempera, PEOPLE, 19 Sep. 2025
At the beginning of the trial and after 12, 24 and 48 weeks, researchers measured participants' C-peptide levels (a marker of insulin secretion) to find out how much insulin participants could make themselves.
—Hannah Millington, MSNBC Newsweek, 18 Sep. 2025
Unlike Novo Nordisk's oral semaglutide, Eli Lilly's pill is not a peptide medication.
—Annika Kim Constantino, CNBC, 17 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 24 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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