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Definition of Menaquinone
1. Noun. (organic compound) Any of a group of polycyclic aromatic ketones, based on 2-methyl-1,4-naphthoquinone. ¹
2. Noun. (vitamin) Vitamin K2 ¹
¹ Source: wiktionary.com
Medical Definition of Menaquinone
1. A fat soluble vitamin that plays an important role in blood clotting. (27 Sep 1997)