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A synthetic compound, C11H8O2, obtained by oxidation of 2-methylnaphthalene, that is converted in the body to vitamin K2 and is used as an additive in animal feed. Also called vitamin K3.


(Biochemistry) a yellow crystalline compound used in fungicides and as an additive to animal feeds. Formula: C11H8O2. Also: vitamin K3
[C20: from me(thyl) + na(phtha) + di-1 + -one]


(ˌmɛn əˈdaɪ oʊn)

a synthetic yellow crystalline powder, C11H8O2, insoluble in water, used as a vitamin K supplement. Also called vitamin K 3.
[1940–45; me (thyl) + na (phthalene) + di-1 + -one]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.menadione - a form of vitamin K
antihemorrhagic factor, naphthoquinone, vitamin K - a fat-soluble vitamin that helps in the clotting of blood
References in periodicals archive ?
Ground yellow corn, meat and bone meal, corn gluten meal, poultry by-product meal, animal fat preserved with BMA/BHT, wheat mill run, natural animal flavor, calcium carbonate, dicalcium phosphate, salt, manganese sulfate, copper sulfate, zinc sulfate ferrous sulfate, sodium selenite, potassium iodide, vitamin D-3 supplement, vitamin E supplement, riboflavin supplement, niacin, pantothenic acid, pyridoxins hydrochloride, thiamine mononitrate, folic acid, vitamin A supplement, biotin, vitamin B-12 supplement, menadione sodium bisulfite.
24 (1) Supplied per kilogram of premix: Cu, 30,000 mg; Fe, 19,000 mg; Zn, 18,000 mg; Mn, 9,600 mg; I, 80 mg; Se, 70 mg; retinyl acetate, 800,000 IU; cholecalciferol, 240,000 IU; DL-[alpha]-tocopheryl acetate, 2,400 IU; menadione sodium bisulfite complex, 480 mg; thiamine, 150 mg; riboflavin, 480 mg; pyridoxine, 240 mg; vitamin [B.
MOTHER], Vitamin A Supplement, Vitamin D3 Supplement, Vitamin E Supplement, Vitamin B12 Supplement, Riboflavin Supplement, Niacin Supplement, Calcium Pantothenate, Choline Chloride, Folic Acid, Menadione Sodium Bisulfite Complex, Methionine Supplement, Calcium Carbonate, Salt, Mangenous Oxide, Ferrous Sulfate, Copper Chloride, Zinc Oxide, Ethylenediamine Dihydriodide, Sodium Selenite.