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1. (n.) vitamin K
a yellowish, oily, viscous liquid, C
2. (n.) vitamin K
a light yellow, crystalline solid, C
Etymology: (1935–40)
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| Definition of 'vitamin k' |
Princeton's WordNet |
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1. (noun) vitamin K, naphthoquinone, antihemorrhagic factor
a fat-soluble vitamin that helps in the clotting of blood
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| Definition of 'vitamin k' |
U.S. National Library of Medicine |
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1. vitamin k
A lipid cofactor that is required for normal blood clotting. Several forms of vitamin K have been identified: VITAMIN K 1 (phytomenadione) derived from plants, VITAMIN K 2 (menaquinone) from bacteria, and synthetic naphthoquinone provitamins, VITAMIN K 3 (menadione). Vitamin K 3 provitamins, after being alkylated in vivo, exhibit the antifibrinolytic activity of vitamin K. Green leafy vegetables, liver, cheese, butter, and egg yolk are good sources of vitamin K.
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Definitions of vitamin k 
