Standard Lemma guide

phytomenadione

noun · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • General-American: /ˌfaɪ.toʊˌmɛn.əˈdaɪˌoʊn/

1

noun

Meaning 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).

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

Topics: biochemistry, biology, chemistry, medicine, microbiology, natural-sciences, pharmacology, physical-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Etymology tree English phyt(ene) Ancient Greek -ο- (-o-)der. Latin -o-bor. English -o- Proto-Indo-European *médhu Proto-Hellenic *méthu Ancient Greek μέθυ (méthu) Proto-Indo-European *swel-der.? Ancient Greek ῡ̔́λη (hū́lē)der. German -yl German Methylbor. English me(thyl) Akkadian napṭumbor.? Old Persian *naftahbor. Ancient Greek νάφθα (náphtha)bor. Latin naphthabor. English naphth(a) English -al French -ènebor. English -ene English na(phthalene) Proto-Indo-European *dwóh1 Proto-Indo-European *dwi- Proto-Hellenic *dwi- Ancient Greek δῐ- (dĭ-)bor. Latin di-bor. English di- German Ketonbor. English ketone English -one English dione English menadione English phytomenadione From phyt(ene) + -o- + menadione.