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

As Berry noted above, other growth-enhancing ingredients include tea tree oil, peptides, and ceramides. —Jenny Berg, Vogue, 4 Feb. 2025

Super Serum Body Wash contains a concentrated serum with beta hydroxy acid to gently exfoliate, plus collagen peptide, niacinamide and vitamins C and E. The result: brighter, hydrated, firmer, smoother and more even skin from the neck down. —Jackie Fields, People.com, 1 Feb. 2025

Many formulas also contain botanicals and peptides to strengthen and condition the lashes. —Bestreviews, Chicago Tribune, 31 Jan. 2025

Ingredient highlights include caffeine, glycerin, squalane, sunflower seed oil, and hyaluronic acid—plus collagen-boosting peptides and redness-reducing panthenol (a form of vitamin B5). —Jennifer Hussein, Allure, 30 Jan. 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

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