Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun An amino acid, C6H13N3O3, originally isolated from watermelon, that is produced as an intermediate in the conversion of ornithine to arginine during urea formation in the liver.

from the GNU version of the Collaborative International Dictionary of English.

  • noun an amino acid that is an intermediate in the conversion of ornithine to arginine.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun biochemistry An amino acid, first isolated from watermelons, that is an intermediate in the urea cycle

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun an amino acid that does not occur in proteins but is an intermediate in the conversion of ornithine to arginine

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[New Latin Citrullus, watermelon genus (from Medieval Latin citrullus, watermelon, from Italian dialectal citrulo, from Late Latin citrium, from Latin citrus, citron) + –ine.]

Examples

  • Another amino acid, L-citrulline, known as citrulline, has been researched for its potential benefits as a workout recovery supplement and to help boost immunity after exercise.

    Leo Galland, M.D.: How to Boost Immunity After Exercise

  • The vital nutrient called citrulline that relaxes the blood vessels is found in the highest concentration in the part you generally don't eat -- the watermelon rind.

    CNN Transcript Jul 2, 2008

  • "Watermelon has a phytonutrient called citrulline, and they've discovered that it can relax blood vessels and have a similar effect to Viagra," Reiley said.

    Breaking News: CBS News

  • "Watermelon has a phytonutrient called citrulline, and they've discovered that it can relax blood vessels and have a similar effect to Viagra," Reiley said.

    Breaking News: CBS News

  • However, watermelon is loaded with a nutrient called citrulline, which helps produce nitric oxide, a powerful blood vessel dilator that's critical to healthy blood flow.

    www.appeal-democrat.com - News :

  • That's because the popular summer fruit is richer than experts believed in an amino acid called citrulline, which relaxes and dilates blood vessels much like Viagra and other drugs meant to treat erectile dysfunction

    Food, travel, recipe & sights

  • However, watermelon is loaded with a nutrient called citrulline that helps produce nitric oxide, a powerful blood vessel dilator that’s critical to healthy blood flow.

    You: On a Diet

  • However, watermelon is loaded with a nutrient called citrulline that helps produce nitric oxide, a powerful blood vessel dilator that’s critical to healthy blood flow.

    You: On a Diet

  • However, watermelon is loaded with a nutrient called citrulline that helps produce nitric oxide, a powerful blood vessel dilator that’s critical to healthy blood flow.

    You: On a Diet

  • Effects of L-citrulline oral supplementation on polymorphonuclear neutrophils oxidative burst and nitric oxide production after exercise.

    Leo Galland, M.D.: How to Boost Immunity After Exercise

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