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

Colloidal gold and peptides make easy work out of transforming dull complexions. —Kiana Murden, Vogue, 12 Dec. 2025

These line-smoothing moisturizers are not only packed with collagen, but also skin-boosting ingredients like peptides and amino acids that work together to make complexion appear more bouncy and resilient. —Deanna Pai, Glamour, 11 Dec. 2025

One of the most prominent examples is CollaSel, the group’s producer of hydrolyzed collagen peptides. —Jon Stojan, USA Today, 10 Dec. 2025

The formula is peptide-rich and will rejuvenate dry lips after a long, dehydrating flight. —Olivia Dubyak, Travel + Leisure, 9 Dec. 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