peptide

noun

pep·​tide ˈpep-ˌtīd How to pronounce peptide (audio)
: 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
peptidic adjective

Examples of peptide in a Sentence

Recent Examples on the Web
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.
Apply with your finger or with a brush to experience sheer, buildable color packed with nourishing agents like peptides, jojoba oil, and shea butter. Kiana Murden, Vogue, 23 May 2025 This ‘Stanley’ of Electric Toothbrushes As the name suggests, the Brightening Eye Stick is a compact, easy-to-use balm formulated with caffeine, niacinamide, and peptides, all of which help combat fine lines and tighten the appearance of the skin. Robyn Merrett, StyleCaster, 23 May 2025 Its second task is to provide long-term and ongoing resilience by sending biomimetic peptides and skin-identical ceramides deep into the dermis for firmness and a clear complexion. Justin Fenner, Robb Report, 12 May 2025 Key ingredients: Vegan collagen peptides, ceramides, cactus extract, squalane Size: 1.0 fl. oz. Danielle Sinay, Glamour, 8 May 2025 See All Example Sentences for peptide

Word History

Etymology

International Scientific Vocabulary, from peptone

First Known Use

1906, in the meaning defined above

Time Traveler
The first known use of peptide was in 1906

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Cite this Entry

“Peptide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/peptide. Accessed 29 May. 2025.

Kids Definition

peptide

noun
pep·​tide ˈpep-ˌtīd How to pronounce peptide (audio)
: any of various substances that are usually obtained by the partial breakdown of proteins

Medical Definition

peptide

noun
pep·​tide ˈpep-ˌtīd How to pronounce peptide (audio)
: 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
peptidic adjective

More from Merriam-Webster on peptide

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