Standard Lemma guide
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.
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noun
A synthetic yellow compound C11H8O2 with the biological activity of natural vitamin K menaquinone, used to treat hemorrhage.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Topics: medicine, pharmacology, sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
a form of vitamin K
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: vitamin K3
Antonyms: none provided
Broader terms: vitamin K, naphthoquinone, antihemorrhagic factor
History
Etymology tree 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 From me(thyl) + na(phthalene) + dione.
