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

Cetaphil’s face serum uses purified peptides to improve your skin’s elasticity and reduce the appearance of lines. —Lauren Taylor, Southern Living, 29 Nov. 2025

Laduora’s own 8Pepta serum was created specifically for this purpose, ensuring safe, even delivery of peptides, niacinamide, hyaluronic acid, and adenosine. —Adam Hurly, Robb Report, 29 Nov. 2025

The Isdin Isdinceutics Age Contour Night Moisturizer taps peptides and hyaluronic acid to improve firmness and elasticity over time. —Lily Wohlner, Allure, 29 Nov. 2025

This Kosas pick is made with caffeine and peptides to brighten and plump, respectively, without clogging your pores. —Alyssa Grabinski, PEOPLE, 28 Nov. 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