Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

menadione

play
noun men·a·di·one \ˌme-nə-ˈdī-ˌōn, -dī-ˈ\

Definition of menadione

  1. :  a yellow crystalline compound C11H8O2 with the biological activity of natural vitamin K



Origin and Etymology of menadione

methyl + napthalene + di- + ketone


First Known Use: 1941


Medical Dictionary

menadione

play
noun men·a·di·one \ˌmen-ə-ˈdī-ˌōn, -dī-ˈ\

Medical Definition of menadione

  1. :  a yellow crystalline compound C11H8O2 with the biological activity of natural vitamin K—called also vitamin K3




Seen and Heard

What made you want to look up menadione? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

of, relating to, or near a shore

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

lavender-fields-in-france

Which of these is a synonym of caesura?

interruption rebellion torrent megillah
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ