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

Searches for peptides are up 550 percent this year alone. —Will Price, Robb Report, 12 Aug. 2025

Past trials using peptide vaccines have failed to prevent cancer recurrences. —Kaitlin Sullivan, NBC news, 11 Aug. 2025

This lightweight sunscreen face serum from Kiehl's protects your skin from the sun's harmful rays while enriching it with collagen-boosting peptides and other healthy ingredients. —Alexandra Pereira, Travel + Leisure, 11 Aug. 2025

The lightweight water-gel formula blends multiple forms of hyaluronic acid with peptides and lentil and biomarine extracts to deliver a firming, moisture-rich boost that leaves skin feeling refreshed and revitalized. —Conçetta Ciarlo, Vogue, 7 Aug. 2025

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
• 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