Learn how to say Menaquinone correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word menaquinone:
[mass noun] Biochemistry
one of the K vitamins, a compound produced by bacteria in the large intestine and essential for the blood-clotting process. It is an isoprenoid derivative of menadione. Also called vitamin K2.
1940s: from the chemical name me(thyl)-na(phtho)quinone