vitamin k3

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WORDNET DICTIONARY

Noun vitamin k3 has 1 sense

vitamin k3(n = noun.substance) menadione - a form of vitamin K;

is a kind of antihemorrhagic factor, naphthoquinone, vitamin k

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CIDE DICTIONARY

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 [WordNet 1.5]