[ three-uh-neen, -nin ]
/ ˈθri əˌnin, -nɪn /

noun Biochemistry.

an essential amino acid, CH3CHOHCH(NH2)COOH, obtained by the hydrolysis of proteins. Abbreviation: Thr; Symbol: T

Origin of threonine

1925–30; threon- (alteration of Greek erythrón, neuter of erythrós red; see erythro-) + -ine2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for threonine

/ (ˈθriːəˌniːn, -nɪn) /


an essential amino acid that occurs in certain proteins

Word Origin for threonine

C20 threon-, probably from Greek eruthron, from eruthros red (see erythro-) + -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

Medicine definitions for threonine

[ thrēə-nēn′, -nĭn ]


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.

Science definitions for threonine

[ thrēə-nēn′ ]

An essential amino acid. Chemical formula: C4H9NO3. See more at amino acid.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.