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[three-uh-neen, -nin] /ˈθri əˌnin, -nɪn/
noun, Biochemistry
an essential amino acid, CH 3 CHOHCH(NH 2)COOH, obtained by the hydrolysis of proteins. Symbol: T.
Abbreviation: Thr;
Origin of threonine
1925-30; threon- (alteration of Greek erythrón, neuter of erythrós red; see erythro-) + -ine2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for threonine


/ˈθriːəˌniːn; -nɪn/
an essential amino acid that occurs in certain proteins
Word Origin
C20 threon-, probably from Greek eruthron, from eruthros red (see erythro-) + -ine²
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
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threonine in Medicine

threonine thre·o·nine (thrē'ə-nēn', -nĭn)
Abbr. Thr
A colorless crystalline amino acid that is derived from the hydrolysis of protein and is an essential component of human nutrition.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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threonine in Science
An essential amino acid. Chemical formula: C4H9NO3. See more at amino acid.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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