menadione

The root of compounds that are 3-multiprenyl derivatives of m. and known as the menaquinones or vitamins K2. SYN: menaphthone, vitamin K3.
- m. sodium bisulfite it possesses the same action and is used for the same purposes as m. or vitamin K; it differs, however, from m. in being water-soluble.

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men·a·di·one .men-ə-'dī-.ōn, -dī-' n a yellow crystalline compound C11H8O2 with the biological activity of natural vitamin K called also vitamin K3

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men·a·di·one (men″ə-diґōn) vitamin K3. 1. [USP] a synthetic fat-soluble provitamin that can be chemically converted in the body to active vitamin K by addition of a long side chain; used as a source of vitamin K in the treatment of hypoprothrombinemia associated with vitamin K deficiency, as occurs in hepatic or biliary disease and malabsorption syndromes, or after administration of salicylates, anticoagulants, or certain antibiotics; administered orally or intramuscularly. 2. the basic double ring quinone structure that is the parent structure of the related compounds with vitamin K activity, which can be formed by addition of long side chain substituents.

Medical dictionary. 2011.

Look at other dictionaries:

  • Menadione — Menadione[1] …   Wikipedia

  • Ménadione — Structure de la ménadione Général …   Wikipédia en Français

  • menadione — [men΄ə dī′ōn, men΄ə dī ōn′] n. [ ME(THYL) + na(phthoquinone) + DI 1 + ONE] a yellow, crystalline powder, C11H8O2, possessing vitamin K activity and used in medicine …   English World dictionary

  • menadione — noun Etymology: methyl + napthalene + di + ketone Date: 1941 a yellow crystalline compound C11H8O2 with the biological activity of natural vitamin K …   New Collegiate Dictionary

  • menadione — (= vitamin K3; 2 methyl 1,4 naphthalene dione.) Synthetic naphthoquinone derivative with properties similar to those of Vitamin K …   Dictionary of molecular biology

  • menadione — /men euh duy ohn/, n. Pharm. a synthetic yellow crystalline powder, C11H8O2, insoluble in water, used as a vitamin K supplement. Also called vitamin K3. [1940 45; ME(THYL) + NA(PHTHALENE) + DI 1 + ONE] * * * …   Universalium

  • menadione — noun a derivative of naphthoquinone that is a constituent of vitamin K …   Wiktionary

  • menadione — men·a·di·one …   English syllables

  • menadione — men•a•di•one [[t]ˌmɛn əˈdaɪ oʊn[/t]] n. biochem. pha a synthetic yellow crystalline powder, C11H8O2, insoluble in water, used as a vitamin K supplement Also called vitamin K3 • Etymology: 1940–45; me (thyl) +na (phthalene) +di I+ one …   From formal English to slang

  • menadione — /mɛnəˈdaɪoʊn/ (say menuh duyohn) noun a yellow crystalline compound, related to vitamin K; vitamin K3. {me(thyl) + na(phtha) + di 1 + one} …   Australian English dictionary

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