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 luxurious pick is made with squalane to soothe and prevent irritation and peptides to smooth visible signs of aging. — Kyra Surgent, InStyle, 5 Aug. 2026

LipLift is powered by the brand’s proprietary Hyaluron Peptide-6 BioFill, a topical volumizing technology formulated with six advanced biomimetic peptides, hyaluronic acid oil, poly-hyaluronic acid filling spheres and bioidentical skin lipids. — Kathryn Hopkins, Footwear News, 4 Aug. 2026

Collagen Peptides Collagen peptides add protein without changing the flavor of the lemonade. — Sarah Anzlovar, Verywell Health, 4 Aug. 2026

But pharmacies were banned in 2023 from dispensing these six peptides—which adherents claim deliver benefits ranging from improved endurance to reduced inflammation—over efficacy and safety concerns. — The Week Us, TheWeek, 3 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
• 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