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

The essence has a high concentration of PDRN, which promotes cellular repair and collagen production, plus niacinamide and copper peptides to leave your skin firmer and smoother. — Essence Wiley, InStyle, 26 Aug. 2026

With that in mind, the formula implements encapsulated peptides to repair broken hair bonds. — Conçetta Ciarlo, Vogue, 24 Aug. 2026

That’s part of a black-market advertising bonanza on the social media site, where sellers are now hawking fake GLP-1 weight-loss drugs and experimental Chinese peptides alongside knockoff luxury handbags and sneakers. — Iain Martin, Forbes.com, 21 Aug. 2026

At the center is the brand’s proprietary Folligen Complex, which combines caffeine, biotin, peptides, and panthenol to care for both scalp and strands. — Christa Joanna Lee, Allure, 20 Aug. 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