poly·​pep·​tide | \ ˌpä-lē-ˈpep-ˌtīd How to pronounce polypeptide (audio) \

Definition of polypeptide

: a molecular chain of amino acids

Keep scrolling for more

Other Words from polypeptide

polypeptidic \ ˌpä-​lē-​(ˌ)pep-​ˈti-​dik How to pronounce polypeptidic (audio) \ adjective

Examples of polypeptide in a Sentence

Recent Examples on the Web

This implied an elementary kind of coding, a basis for the exchange of information between the RNA and the polypeptide. Quanta Magazine, "The End of the RNA World Is Near, Biochemists Argue," 19 Dec. 2017 Try the award-winning Jelly Cleanser with the age-reversing polypeptide moisturizer and the Umbra Sheer SPF 30 to look your selfie-best while also protecting against harmful UV rays. Alexandra Deabler, Fox News, "Best skincare regiments for summer selfies," 8 May 2018 But in people who have this form of diabetes, cells of the pancreas amass clumps of a protein known as islet amyloid polypeptide (IAPP), which is very similar to the β amyloid that accumulates in Alzheimer’s disease. Mitch Leslie, Science | AAAS, "Could diabetes spread like mad cow disease?," 1 Aug. 2017 These include parvalbumin (PV), somatostatin (SOM), and vasoactive intestinal polypeptide (VIP)-expressing interneurons. Beth Mole, Ars Technica, "Scientists come up with neural mechanism—and possible fix—for chronic pain," 27 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'polypeptide.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of polypeptide

1903, in the meaning defined above

History and Etymology for polypeptide

International Scientific Vocabulary

Keep scrolling for more

Learn More about polypeptide

Statistics for polypeptide

Last Updated

29 Jun 2019

Look-up Popularity

Time Traveler for polypeptide

The first known use of polypeptide was in 1903

See more words from the same year

Keep scrolling for more

More Definitions for polypeptide


poly·​pep·​tide | \ ˌpäl-i-ˈpep-ˌtīd How to pronounce polypeptide (audio) \

Medical Definition of polypeptide

: a molecular chain of amino acids

Other Words from polypeptide

polypeptidic \ -​(ˌ)pep-​ˈtid-​ik How to pronounce polypeptidic (audio) \ adjective

More from Merriam-Webster on polypeptide

Britannica.com: Encyclopedia article about polypeptide

Comments on polypeptide

What made you want to look up polypeptide? Please tell us where you read or heard it (including the quote, if possible).


to form ideas or theories about something

Get Word of the Day daily email!

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
Spell It

Can you spell these 10 commonly misspelled words?

Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!