qui·no·noid kwi-'nō-.nȯid, 'kwin-ə-.nȯid or quin·oid 'kwi-.nȯid adj resembling quinone esp having a structure characterized by a benzene nucleus containing two instead of three double bonds within the nucleus and two external double bonds attached to the nucleus either at ortho or para positions (as in the two carbonyl groups of quinones)

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quin·o·noid (kwinґo-noid) resembling a quinone or containing a quinone (particularly a benzoquinone) ring structure.

Medical dictionary. 2011.

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  • quinonoid — [kwin′ə noid΄, kwi nō′noid] adj. [ QUINON(E) + OID] like quinone in structure, properties, etc …   English World dictionary

  • Quinonoid zwitterion — A Quinonoid zwitterion is a special type of zwitterion based on quinone related chemical compounds. The benzene derivate 1,3 dihydroxy 4,6 diaminobenzene is easily oxidized by air in water or methanol to the quinonoid. This compound was first… …   Wikipedia

  • quinonoid — or quinoid adjective Date: 1878 resembling quinone especially in having a 6 membered carbon ring containing two double bonds …   New Collegiate Dictionary

  • quinonoid — /kwin euh noyd , kwi noh noyd/, adj. Chem. of or resembling quinone. Also, quinoid, quinoidal /kwi noyd l/. [1875 80; QUINONE + OID] * * * …   Universalium

  • quinonoid — adjective of, relating to, or having the structure of a quinone …   Wiktionary

  • quinonoid — qui·no·noid …   English syllables

  • quinonoid — quin•o•noid [[t]ˈkwɪn əˌnɔɪd, kwɪˈnoʊ nɔɪd[/t]] adj. chem. of or resembling quinone • Etymology: 1875–80 …   From formal English to slang

  • quinonoid — /ˈkwɪnənɔɪd/ (say kwinuhnoyd), /kwəˈnoʊnɔɪd/ (say kwuh nohnoyd) adjective of or resembling quinone. {quinon(e) + oid} …  

  • quinonoid — …   Useful english dictionary

  • quinonoid formula — A formula based upon the diketone configuration of 1.4 quinone (benzoquinone), involving the rearrangement of the double bonds in a benzene nucleus; adopted to explain the formation of dyestuffs, e.g., coloured salts of compounds of the… …   Dictionary of automotive terms

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