[three-uh-neen, -nin]
noun Biochemistry.
an essential amino acid, CH 3 CHOHCH(NH 2 )COOH, obtained by the hydrolysis of proteins. Abbreviation: Thr; Symbol: T

1925–30; threon- (alteration of Greek erythrón, neuter of erythrós red; see erythro-) + -ine2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
threonine (ˈθriːəˌniːn, -nɪn)
an essential amino acid that occurs in certain proteins
[C20 threon-, probably from Greek eruthron, from eruthros red (see erythro-) + -ine²]

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American Heritage
Medical Dictionary

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
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American Heritage
Science Dictionary
threonine   (thrē'ə-nēn')  Pronunciation Key 
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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