gly·cine | \ˈglī-ˌsēn, ˈglī-sᵊn\

Definition of glycine 

: a sweet crystalline amino acid C2H5NO2 obtained especially by hydrolysis of proteins

Examples of glycine in a Sentence

Recent Examples on the Web

The Stardust recovery mission found organics and glycine - one of the simplest amino acids. Jamie Seidel, Fox News, "Wild new alien theory emerges," 28 June 2018 Rosetta sent back mass spectrometry data showing that glycine, the simplest amino acid, was present on the comet. Luba Ostashevsky, Ars Technica, "How did life begin? It’s Chemistry 101, but in space," 26 Feb. 2018 The collagen found in our bodies is made up of several amino acids, including glycine, proline, hydroxyproline, and arginine. Elise Deming, Rdn, Ldn,, "What is collagen and why are people eating it?," 26 Feb. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'glycine.' 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 glycine

1851, in the meaning defined above

Keep scrolling for more

Learn More about glycine

Statistics for glycine

Look-up Popularity

Time Traveler for glycine

The first known use of glycine was in 1851

See more words from the same year

Keep scrolling for more

More Definitions for glycine


gly·cine | \ˈglī-ˌsēn, ˈglīs-ᵊn \

Medical Definition of glycine 

: a sweet crystalline nonessential amino acid C2H5NO2 that is a neurotransmitter which induces inhibition of postsynaptic neurons, is obtained by hydrolysis of proteins or is prepared synthetically, and is used in the form of its salt as an antacid or in aqueous solution as an irrigating fluid in transurethral surgery abbreviation Gly

called also aminoacetic acid, glycocoll

More from Merriam-Webster on glycine Encyclopedia article about glycine

Comments on glycine

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


required by fashion, etiquette, or custom

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble-tiles-that-read-scrabble-quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Add Diction

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!