: 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
For best results, Weiser advises using a low level light therapy cap or helmet three to five times a week alongside a scalp serum with growth factors or scalp-supporting peptides.
—
Rebecca Strong, USA Today, 3 Apr. 2026
In addition to strengthening the skin, the firming complex also helps to hydrate and plump the skin with hibiscus peptides, collage, and hyaluronic acid.
—Alicia Geigel, Southern Living, 2 Apr. 2026
The Wegovy pill works by mimicking a protein in your body called glucagon-like peptide 1 (GLP-1).
—Korin Miller, SELF, 2 Apr. 2026
The new oral medication is the latest glucagonlike peptide 1 (GLP-1) drug in the rapidly expanding market.
—Lauren J. Young, Scientific American, 2 Apr. 2026
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.
Rebecca Strong, USA Today, 3 Apr. 2026
In addition to strengthening the skin, the firming complex also helps to hydrate and plump the skin with hibiscus peptides, collage, and hyaluronic acid.
—Alicia Geigel, Southern Living, 2 Apr. 2026
The Wegovy pill works by mimicking a protein in your body called glucagon-like peptide 1 (GLP-1).
—Korin Miller, SELF, 2 Apr. 2026
The new oral medication is the latest glucagonlike peptide 1 (GLP-1) drug in the rapidly expanding market.
—Lauren J. Young, Scientific American, 2 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 5 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
Love words? Need even more definitions?
Merriam-Webster unabridged
