menadione

noun Pharmacology.

1. a synthetic yellow crystalline powder, C11H8O2, insoluble in water, used as a vitamin K supplement.

noun

1. a yellow crystalline compound used in fungicides and as an additive to animal feeds. Formula: C 11 H 8 O 2Also: vitamin K 3

n.

1. A synthetic vitamin K derivative occurring as a yellow crystalline powder and used as a vitamin K supplement.