vitamin K

noun

1. any of the fat-soluble vitamins, including phylloquinone and the menaquinones, which are essential for the normal clotting of blood

vitamin K

1. Any of a group of fat-soluble vitamins that are involved in the formation of prothrombin and other clotting factors in the liver and are essential for normal clotting of the blood. (The K is derived from the German word koagulation. ) Vitamin K is also involved in bone formation and repair. Two forms occur naturally: vitamin K 1 , which is synthesized by plants, and vitamin K 2 , which is mainly synthesized by intestinal bacteria. The other forms are synthetic substances with similar chemical structures.

Example Sentences

At 96 percent water, cukes have no saturated fat or cholesterol, and are very high in vitamin K, vitamin B6 and iron.

From The Daily Beast