vitamin K

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vitamin K

n.
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.]

vitamin K1

n.
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.

vitamin K2

n.
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.

vitamin K3

n.
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.

vitamin K

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

vitamin K1


n.
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.
[1930–35]

vitamin K2


n.
a light yellow, crystalline solid, C41H56O2, having properties similar to those of vitamin K1.
[1935–40]

vitamin K3


n.
[1955–60]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

vitamin K

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.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.vitamin K - a fat-soluble vitamin that helps in the clotting of blood
fat-soluble vitamin - any vitamin that is soluble in fats
phylloquinone, phytonadione, vitamin K1 - a form of vitamin K
menadione, vitamin K3 - a form of vitamin K
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.