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

peptidic

pep-ˈti-dik 

adjective

Examples of peptide in a Sentence

Recent Examples on the Web

And Caitlin Kiernan, Flow Space’s editorial director, led a conversation about peptides, one of the wellness world’s buzziest and most misunderstood topics. — Helen Carefoot, Flow Space, 29 Sep. 2026

Existing glucagonlike peptide 1 (GLP-1) receptor agonist drugs such as semaglutide, sold as Ozempic and Wegovy, bind to GLP-1 hormone receptors in the brain, where the receptors help regulate hunger. — Jackie Flynn Mogensen, Scientific American, 29 Sep. 2026

As Hamshaw explains it, the microorganisms used to make tempeh produce enzymes that begin breaking soybean proteins into smaller components during fermentation, including peptides and amino acids. — Alessandra Signorelli, Vogue, 25 Sep. 2026

The secret is the brand’s special blend of peptides that boosts hair fibers and reverses damage, per its website. — Kim Grundy, InStyle, 25 Sep. 2026

Word History

Etymology

International Scientific Vocabulary, from peptone

First Known Use

1906, in the meaning defined above

Phrases Containing peptide

• amyloid beta peptide
• atrial natriuretic peptide
• beta-amyloid peptide
• gastric inhibitory peptide
• glucagon-like peptide
• glucose-dependent insulinotropic peptide
• opioid peptide
• peptide bond
• peptide linkage

Rhymes for peptide

• abide
• allied
• applied
• aside
• astride
• azide
• backside
• bankside
• bastide
• bayside
• bedside
• belied

Kids 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

peptidic

pep-ˈtid-ik 

adjective