[ glahy-seen, glahy-seen ]
/ ˈglaɪ sin, glaɪˈsin /
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noun Biochemistry.

a colorless, crystalline, sweet, water-soluble solid, H2NCH2COOH, the simplest amino acid: used chiefly in organic synthesis and biochemical research. Abbreviation: Gly; Symbol: G



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Also called aminoacetic acid, gly·co·coll [glahy-kuh-kol]. /ˈglaɪ kəˌkɒl/.

Origin of glycine

First recorded in 1850–55; glyc- + -ine2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for glycine

British Dictionary definitions for glycine

/ (ˈɡlaɪsiːn, ɡlaɪˈsiːn) /


a nonessential amino acid occurring in most proteins that acts as a neurotransmitter; aminoacetic acid

Word Origin for glycine

C19: glyco- + -ine ²
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for glycine

[ glīsēn′, -sĭn ]


A nonessential amino acid derived from the alkaline hydrolysis of gelatin and used as a nutrient and dietary supplement, also used in biochemical research and in the treatment of certain myopathies.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for glycine

[ glīsēn′, -sĭn ]

A nonessential amino acid. Glycine is the simplest amino acid. Chemical formula: C2H5NO2. See more at amino acid.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.