'vitamin K' definitions:

Definition of 'vitamin K'

noun

A fat-soluble vitamin that helps in the clotting of blood [syn: vitamin K, naphthoquinone, antihemorrhagic factor]

Definition of 'vitamin K'

From: GCIDE

vitamin K \vitamin K\ n. (1929) [from G. Koagulationsvitamin.] either of two fat-soluble vitamins (vitamin K1 or vitamin K2) that help clot blood by participating in the fromation of prothrombin.
Syn: naphthoquinone. [WordNet 1.5 +PJC]

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