• synonyms


[ser-een, -in, seer-]
See more synonyms on Thesaurus.com
noun Biochemistry.
  1. a crystalline amino acid, HOCH2CH(NH2)COOH, found in many proteins and obtained by the hydrolysis of sericin, the protein constituting silk gum. Abbreviation: Ser; Symbol: S

Origin of serine

First recorded in 1875–80; ser(um) + -ine2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for serine


  1. a sweet-tasting amino acid that is synthesized in the body and is involved in the synthesis of cysteine; 2-amino-3-hydroxypropanoic acid. Formula: CH 2 (OH)CH(NH 2)COOH

Word Origin

C19: from sericin + -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

Word Origin and History for serine


type of amino acid, 1880, from German serin (1865), from Latin sericum "silk" (see serge), with chemical suffix -ine (2).

Online Etymology Dictionary, © 2010 Douglas Harper

serine in Medicine


  1. An amino acid that is a common constituent of many proteins.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

serine in Science


  1. A nonessential amino acid. Chemical formula: C3H7NO3. See more at amino acid.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.