: 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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Several peptides, such as BPC-157 and TB-500, are banned by international sports authorities as doping substances.
—
Matthew Perrone, Los Angeles Times, 16 Apr. 2026
For Beauty Boost, the mill takes inspiration from skincare by using Umorfil, a fiber made from upcycled fish scales, enriched with collagen peptides.
—Angela Velasquez, Footwear News, 16 Apr. 2026
Key Takeaways Sourdough bread contains peptides that might help lower blood pressure by relaxing blood vessels.
—Morgan Pearson, Verywell Health, 16 Apr. 2026
But online, peptides typically refer to unproven drugs, often given by injection, that are peddled without evidence as treating various conditions, reversing aging, and improving appearance.
—Beth Mole, ArsTechnica, 16 Apr. 2026
See All Example Sentences for peptide
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Matthew Perrone, Los Angeles Times, 16 Apr. 2026
For Beauty Boost, the mill takes inspiration from skincare by using Umorfil, a fiber made from upcycled fish scales, enriched with collagen peptides.
—Angela Velasquez, Footwear News, 16 Apr. 2026
Key Takeaways Sourdough bread contains peptides that might help lower blood pressure by relaxing blood vessels.
—Morgan Pearson, Verywell Health, 16 Apr. 2026
But online, peptides typically refer to unproven drugs, often given by injection, that are peddled without evidence as treating various conditions, reversing aging, and improving appearance.
—Beth Mole, ArsTechnica, 16 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 24 Apr. 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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