vitamin K (redirected from vitamin K K1)

vitamin K

n.

A fat-soluble vitamin, occurring in leafy green vegetables, tomatoes, and egg yolks, that promotes blood clotting and prevents hemorrhaging. It exists in several related forms, such as K₁ and K₂.

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vitamin K₁

n.

A yellow viscous oil, C₃₁H₄₆O₂, found in leafy green vegetables or made synthetically, used by the body in the synthesis of prothrombin and in veterinary medicine as an antidote to certain poisons.

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vitamin K₂

n.

A crystalline compound, C₄₁H₅₆O₂, isolated from putrefied fish meal or from various intestinal bacteria, used to stop hemorrhaging and in veterinary medicine as an antidote to certain poisons.

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vitamin K

n pl K vitamins

(Chemistry / Elements & Compounds) any of the fat-soluble vitamins, including phylloquinone and the menaquinones, which are essential for the normal clotting of blood

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vitamin K

Any of a group of fat-soluble vitamins that are involved in the formation of prothrombin and other clotting factors in the liver and are essential for normal clotting of the blood. (The K is derived from the German word koagulation.) Vitamin K is also involved in bone formation and repair. Two forms occur naturally: vitamin K₁, which is synthesized by plants, and vitamin K₂, which is mainly synthesized by intestinal bacteria. The other forms are synthetic substances with similar chemical structures.

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vitamin K₁

The major dietary form of vitamin K that is synthesized in plants and found primarily in green, leafy vegetables such as alfalfa and in vegetable oils. It can be made synthetically and is given orally to treat prothrombin deficiency that results from heparin and other anticoagulant drugs. Also called phylloquinone. Chemical formula: C₃₁H₄₆O₂.

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vitamin K₂

A form of vitamin K that is synthesized by bacteria in the intestine and is also found in fish and other foods. Also called menaquinone. Chemical formula: C₄₁H₅₆O₂.

Thesaurus

Noun

1.

vitamin K - a fat-soluble vitamin that helps in the clotting of blood antihemorrhagic factor, naphthoquinone 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