vitamin K

Vitamin K denotes a group of lipophilic, and hydrophobic, vitamins that are needed for the posttranslational modification of certain proteins, mostly required for blood coagulation. Chemically they are 2-methyl-1,4-naphthoquinone derivatives. Vitamin K2 (menaquinone, menatetrenone) is normally produced by bacteria in the intestines, and dietary deficiency is extremely rare unless the intestines are heavily damaged.
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Vitamin K n. Any of several fat-soluble compounds that are found in alfalfa, hog liver, fish meal, and vegetable oils and are essential for the [more]Vitamin K - Community and Resources

Noun
1. a fat-soluble vitamin that helps in the clotting of blood
(synonym) naphthoquinone, antihemorrhagic factor
(hypernym) fat-soluble vitamin
(hyponym) vitamin K1, phylloquinone, phytonadione

An essential factor in the formation of blood clotting factors. Deficiency can lead to abnormal bleeding.

A substance that promotes the clotting of blood.