What does "menadione" mean?

A synthetic yellow compound C₁₁H₈O₂ with the biological activity of natural vitamin K menaquinone, used to treat hemorrhage.

How do you pronounce "menadione"?

Pronounced //ˌmɛn.əˈdʌɪ.əʊn//.

Common synonyms include: vitamin k3, ascorbic acid, niacin, riboflavin, synthetic vitamin k, vitamin.

/ˌmɛn.əˈdʌɪ.əʊn/ noun

noun ·Rare ·Advanced level

Noun

1
A synthetic yellow compound C₁₁H₈O₂ with the biological activity of natural vitamin K menaquinone, used to treat hemorrhage. countable, uncountable
2
a synthetic chemical compound that is a form of vitamin K, it is an analog of 1,4-naphthoquinone with a methyl group in the 2-position wordnet

From me(thyl) + na(phthalene) + dione.