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menadione men·a·di·one (měn'ə-dī'ōn')
A synthetic vitamin K derivative occurring as a yellow crystalline powder and used as a vitamin K supplement.
vitamin K1 n.
A yellow viscous oil found in leafy green vegetables or made synthetically, used by the body to form prothrombin.
vitamin K2 n.
Any of various yellowish crystalline compounds isolated from putrefied fish meal or from various intestinal bacteria and used to stop hemorrhaging. Also called menaquinone.