: 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
It’s made with conditioning peptides that actively strengthen and protect lashes, while panthenol, a form of vitamin B5, keeps them soft and flexible rather than brittle or flaky.
—
Jailynn Taylor, Allure, 10 May 2026
Jenner may be referring to a less mainstream GLP-1 drug or another peptide therapy, which can include a broader category of injections that affect metabolism and hormones.
—Taijuan Moorman, USA Today, 8 May 2026
Skin-care treatments using peptides can be topical — meaning, applied to the skin — or injected or infused.
—Jane Yoo, EverydayHealth.com, 8 May 2026
Social media influencers, podcasters, wellness clinics and online sellers promote peptides as a quick and easy way to build muscle faster, heal injuries more quickly, reduce inflammation, lose fat, sleep better and more.
—Flynn McGuire, The Conversation, 7 May 2026
See All Example Sentences for peptide
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Jailynn Taylor, Allure, 10 May 2026
Jenner may be referring to a less mainstream GLP-1 drug or another peptide therapy, which can include a broader category of injections that affect metabolism and hormones.
—Taijuan Moorman, USA Today, 8 May 2026
Skin-care treatments using peptides can be topical — meaning, applied to the skin — or injected or infused.
—Jane Yoo, EverydayHealth.com, 8 May 2026
Social media influencers, podcasters, wellness clinics and online sellers promote peptides as a quick and easy way to build muscle faster, heal injuries more quickly, reduce inflammation, lose fat, sleep better and more.
—Flynn McGuire, The Conversation, 7 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 15 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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