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

Body Protection Compound-157 is a peptide that naturally occurs in human gastric juice. — Omer Awan, Forbes.com, 21 July 2026

Created with the brand’s proprietary PhotoActiv8 technology, the formula features ubiquinol, astaxanthin, adenosine and the copper peptide GHK-Cu to support cellular energy and collagen production. — Ryma Chikhoune, Footwear News, 21 July 2026

Headquartered in Baar, Switzerland, PolyPeptide Group, which was spun off in 1996 from global pharmaceutical company Ferring, has a track record of developing and producing more than 1,000 therapeutic peptides. — Jenny Lee, CNBC, 20 July 2026

Under former president Joe Biden, the agency classified 19 peptides as unsafe and barred compounding pharmacies from producing and selling them. — The Week Us, TheWeek, 20 July 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
• 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