'vitamin K3' definitions:

Definition of 'vitamin K3'

From: WordNet
noun
A form of vitamin K [syn: vitamin K3, menadione]

Definition of 'vitamin K3'

From: GCIDE
  • vitamin K3 \vitamin K3\ n. menadione, (C11H8O2) being chemically 2-methyl-1,4,-naphthoquinone. Having no side chain in the 3 position, it cannot exert all functions of a true K vitamin and the designation as vitamin K3 has been discouraged --[MI11]
  • Syn: vitaminK2(0); menaphthone. [WordNet 1.5]