[ ser-een, -in, seer- ]
/ ˈsɛr in, -ɪn, ˈsɪər- /

noun Biochemistry.

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


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Origin of serine

First recorded in 1875–80; ser(um) + -ine2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for serine

/ (ˈsɛriːn, ˈsɪəriːn, -rɪn) /


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 for serine

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

Medical definitions for serine

[ sĕrēn′ ]


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.

Scientific definitions for serine

[ sĕrēn′ ]

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.