vitamin K(redirected from Naphthoquinones)
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A fat-soluble vitamin, found in leafy green vegetables and some animal products and produced by intestinal bacteria, that plays an essential role in blood clotting. It exists in two main forms, K1 and K2.
[Abbreviation and partial translation of German K(oagulations)vitamin, coagulation vitamin, clotting vitamin, from Koagulation, coagulation, from Latin coāgulātiō, coāgulātiōn-, from coāgulāre, to curdle, coagulate; see coagulate.]
1. A yellow viscous oil, C31H46O2, found in leafy green vegetables and used by the body in the synthesis of prothrombin. Also called phylloquinone.
2. A synthetic analog of this vitamin, used in the treatment of some coagulation disorders and to prevent hemorrhagic disease in newborns. In veterinary medicine, it is used as an antidote to poisoning by anticoagulant rodenticides. Also called phytonadione.
Any of several fat-soluble compounds found in liver and other animal products and in some fermented foods and synthesized in the body by intestinal bacteria. Also called menaquinone.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
n, pl K vitamins
(Elements & Compounds) any of the fat-soluble vitamins, including phylloquinone and the menaquinones, which are essential for the normal clotting of blood
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a yellowish, oily, viscous liquid, C31H46O2, that occurs in leafy vegetables, rice, bran, and hog liver or is obtained esp. from alfalfa or putrefied sardine meat or synthesized and that promotes blood clotting by increasing the prothrombin content of the blood. Also called phylloquinone, phytonadione.
a light yellow, crystalline solid, C41H56O2, having properties similar to those of vitamin K1.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Any of a group of vitamins important for normal clotting of the blood. Vitamin K is found in green leafy vegetables, pork, liver, and vegetable oils.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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|Noun||1.||vitamin K - a fat-soluble vitamin that helps in the clotting of blood|
fat-soluble vitamin - any vitamin that is soluble in fats
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