citrulline

[ si-truh-leen ]

/ ˈsɪ trəˌlin /

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noun Biochemistry.

an amino acid, NH2CONH(CH2)3CHNH2COOH, abundant in watermelons and an intermediate compound in the urea cycle.

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Origin of citrulline

1930; <New Latin citrull(us) the watermelon genus (Medieval Latin citrul(l)us, citrolus, Latinization of South Italian citrulo, Tuscan citri(u)olo<Late Latin citrium watermelon (derivative of Latincitrus (see citrus); apparently in reference to the citroncolored fruit of some types of watermelon), with -uolo<Latin -eolus) + -ine²

Words nearby citrulline

citronellal, citronella oil, citronellol, citron melon, citron wood, citrulline, citrus, citrus canker, citrus greening disease, Citrus Heights, citrus red mite

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use citrulline in a sentence

Still others, like caffeine and citrulline malate, have more equivocal evidence.
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British Dictionary definitions for citrulline

citrulline

/ (ˈsɪtrəˌliːn) /

noun

an amino acid that occurs in watermelons and is an intermediate in the formation of urea. Formula: NH 2 CONH(CH 2) 3 CHNH 2 COOH

Word Origin for citrulline

C20: from Medieval Latin citrullus a kind of watermelon, from Latin citron, referring to its colour

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

Scientific definitions for citrulline

citrulline

[ sĭt′rə-lēn′ ]

An amino acid originally isolated from watermelon, occurring mostly in the liver as an intermediate in the conversion of ornithine to arginine during urea formation. Chemical formula: C6H13N3O3.