Meaning of VITAMIN K

WordNet Dictionary
	Definition:		[n]  a fat-soluble vitamin that helps in the clotting of blood
	Synonyms:		antihemorrhagic factor, naphthoquinone
	See Also:		fat-soluble vitamin, menadione, phylloquinone, phytonadione, vitamin K1, vitamin K3
Medical Dictionary
	Definition:		A substance that promotes the clotting of blood. A vitamin active in the process of blood coagulation.
Biology Dictionary
	Definition:		A fat-soluble vitamin needed to synthesize blood-clotting factors such as prothrombin; it is synthesized by certain harmless bacteria that normally live in the human intestine.