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Definition of Menadione
1. Noun. A form of vitamin K. 
Definition of Menadione
1. [n -S]
Medical Definition of Menadione
1. A fat soluble vitamin that plays an important role in blood clotting. (27 Sep 1997)
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1. Noun. A form of vitamin K. 
1. [n -S]
1. A fat soluble vitamin that plays an important role in blood clotting. (27 Sep 1997)