menadione
noun
men·a·di·one ˌme-nə-ˈdī-ˌōn 
-dī-ˈ
: a yellow crystalline compound C11H8O2 with the biological activity of natural vitamin K
Word History
Etymology
methyl + napthalene + di- + ketone
First Known Use
1941, in the meaning defined above
Medical Definition
menadione
noun
men·a·di·one ˌmen-ə-ˈdī-ˌōn, -dī-ˈ
: a yellow crystalline compound C11H8O2 with the biological activity of natural vitamin K
called also vitamin K3
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