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

Enhanced Group, the company behind the Games, had recently begun selling peptides, supplements, and testosterone, over the counter and by prescription, to the public. — Zach Helfand, New Yorker, 13 July 2026

The drugs normalized injectable medications, and patients saw the power of peptides firsthand. — Jenna Anderson, Health, 13 July 2026

Infused with hyaluronic acid and peptides, the tinted moisturizer deeply hydrates, plumps, and smooths skin. — Alyssa Morin, InStyle, 11 July 2026

In addition to that very concerning laundry list of potential side effects, people are currently buying Melanotan II and its peptide peers from unregulated online sources, also known as the gray market. — Kara Nesvig, Allure, 9 July 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