: 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
From sheet masks soaked in peptides to luxe overnight masks packed with probiotics, these ones go way beyond basic Mask Monday.
—
Marie Lodi, Allure, 2 June 2025
Bromelain helps break down protein into small peptides that your body can easily absorb.19
11.
—Lindsey Desoto, Health, 12 May 2025
Of the three categories of peptides, the experts tell ESSENCE that the most common type used in lip products are signal peptides.
—Jessica Fields, Essence, 7 May 2025
Both types of peptide bind to the same receptors on nerve cells, impairing communication between neurons and potentially causing muscle paralysis and respiratory failure.
—Katherine Bourzac, Scientific American, 7 May 2025
See All Example Sentences for peptide
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Marie Lodi, Allure, 2 June 2025
Bromelain helps break down protein into small peptides that your body can easily absorb.19
11.
—Lindsey Desoto, Health, 12 May 2025
Of the three categories of peptides, the experts tell ESSENCE that the most common type used in lip products are signal peptides.
—Jessica Fields, Essence, 7 May 2025
Both types of peptide bind to the same receptors on nerve cells, impairing communication between neurons and potentially causing muscle paralysis and respiratory failure.
—Katherine Bourzac, Scientific American, 7 May 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 10 Jun. 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share