noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   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). uncountable

Synonyms

All synonyms

phylloquinonevitamin k1

Etymology

From phyt(ene) + -o- + menadione.

Related phrases

vitamin k1

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.