phytomenadione

== English == === Alternative forms === phytonadione === Etymology === From phyt(ene) + -o- + menadione. === Pronunciation === (General American) IPA(key): /ˌfaɪ.toʊˌmɛn.əˈdaɪˌoʊn/ === Noun === phytomenadione (uncountable) (biochemistry, pharmacology) A yellow oily naphthoquinone C31H46O2 that is obtained especially from alfalfa, cabbage, spinach, and other leafy green vegetables or made synthetically and that has a fast, potent, and prolonged biological effect. It is essential for the blood-clotting process, effective orally, and useful especially in treating hypoprothrombinemia induced by anticoagulant drugs (trademark Mephyton). ==== Synonyms ==== phylloquinone vitamin K1 === References === “phylloquinone”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022. “vitamin K”, in Merriam-Webster.com Medical Dictionary, Springfield, Mass.: Merriam-Webster.