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 reason Norton was taking peptides was probably to help keep up his athleticism in his old age. — Frank Landymore, Futurism, 7 Nov. 2026

Drinking and breast cancer risk, endometrial cancers, peptides and more, in readers' eyes. — Letters To The Editor, Washington Post, 6 Nov. 2026

There’s a lot of studies looking at either collagen peptides alone, placebo, or collagen peptides with combined MSM. — Team Verywell Health, Verywell Health, 4 Nov. 2026

The bond builders and peptides that used to be reserved for salon treatments now show up in everyday formulas, along with proteins designed to mimic your hair’s own keratin. — Valeriya Chupinina, Vogue, 4 Nov. 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
• gastric inhibitory peptide
• glucagon-like peptide
• glucose-dependent insulinotropic 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