Any of a group of vitamins found mainly in green leaves and essential for the blood-clotting process. They include phylloquinone ( vitamin K1), menaquinone ( vitamin K2), and menadione ( vitamin K3).
More example sentences
- It interferes with the body's natural chemical process of clotting, by targeting an essential substance called vitamin K.
- Selecting products with selected other nutrients such as vitamin D and vitamin K was discussed.
- One such product is vitamin K, a substance essential for blood clotting.
Definition of vitamin K in:
- The British & World English dictionary