: 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 high-tech formula is powered by a proprietary peptide-and-vitamin-C complex designed to help prevent hair loss.
—
Jenny Berg, Vogue, 24 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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Jenny Berg, Vogue, 24 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 2 Oct. 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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