: 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
Olay Super Serum Body Wash for Normal Skin Olay Super Serum Body Wash is formulated with ingredients such as vitamin E, collagen peptide, vitamin C, niacinamide, and BHA, which combine to create a powerful formula that hydrates, firms, brightens, evens, and smooths the skin.
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Claire West, Parents, 27 Feb. 2026
Its star ingredient, matrixyl, is a blend of peptides that support your skin’s natural collagen production with long-term anti-aging results that target deeper lines and wrinkles.
—Caley Sturgill, Southern Living, 27 Feb. 2026
This Lifting & Firming Face Primer from Kelly Zhang is packed with peptides, soothing aloe, and brightening orange peel extract to help smooth, firm, and illuminate skin, all while creating an ideal base for makeup.
—Sara Tan, Allure, 27 Feb. 2026
Hyaluronic acid, peptides, and botanical extracts provide pore-minimizing, firming, and line-smoothing properties.
—Tamim Alnuweiri, InStyle, 27 Feb. 2026
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Claire West, Parents, 27 Feb. 2026
Its star ingredient, matrixyl, is a blend of peptides that support your skin’s natural collagen production with long-term anti-aging results that target deeper lines and wrinkles.
—Caley Sturgill, Southern Living, 27 Feb. 2026
This Lifting & Firming Face Primer from Kelly Zhang is packed with peptides, soothing aloe, and brightening orange peel extract to help smooth, firm, and illuminate skin, all while creating an ideal base for makeup.
—Sara Tan, Allure, 27 Feb. 2026
Hyaluronic acid, peptides, and botanical extracts provide pore-minimizing, firming, and line-smoothing properties.
—Tamim Alnuweiri, InStyle, 27 Feb. 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 4 Mar. 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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