menaquinone

/M EH0 N AE1 K W IH0 N OW1 N IY0/
noun
  1. 1

    Any of a group of polycyclic aromatic ketones, based on 2-methyl-1,4-naphthoquinone.

  2. 2

    Vitamin K2

Source: https://en.wiktionary.org/wiki/menaquinone