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

Inside, hyaluronic acid microspheres and peptides draw moisture into the lips, while botanical butters lock it in; depositing onto lips a cooling, balm texture that enhances comfort. —Kiana Murden, Vogue, 21 Feb. 2026

Powered by peptides, this budget-friendly eye serum primarily targets dark circles, puffiness, fine lines, and wrinkles. —Tracy Perez Han, InStyle, 20 Feb. 2026

Ingredients like copper peptide, tyrosine, and certain antioxidants are being studied for their potential benefits in preserving natural pigment. —Adam Hurly, Robb Report, 19 Feb. 2026

Patients arrive at my office convinced that the right peptides, cold plunges, or lab tests can meaningfully extend their lives. —Jordan D. Metzl, The Atlantic, 19 Feb. 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