Definition of quinone in US English:



  • 1

    another term for 1,4-benzoquinone (see benzoquinone)
    • ‘The chemical formula for quinone is C 6 H 4 O 2, and its molecular weight is 108.1 grams per mole.’
    • ‘The formation of the dimers is strongly favored by the contiguous presence of quinone and hydroquinone.’
    1. 1.1 Any compound with the same ring structure as 1,4-benzoquinone.
      • ‘This organic fraction contains polycyclic aromatic hydrocarbons, halogenated aromatic hydrocarbons, and quinones, including reactive oxygen species that produce a strong oxidative stress response.’
      • ‘However, during infection and damage phenols and oxidases, such as peroxidase and tyrosinase, become decompartmentalized and could oxidize phenolic compounds to form antimicrobial quinones.’
      • ‘Lapachol, a quinone, is a recognized antitumor agent found in the wood and barely in the bark.’
      • ‘She said other researchers had shown that these ultrafine particles can carry toxic chemicals such as quinones and polycyclic aromatic hydrocarbons (PAHs).’
      • ‘Several kinds of compounds are activated under hypoxic conditions: aromatic and aliphatic N-oxides, quinones, nitroaromatics and organo-metallic compounds.’


Mid 19th century: from Spanish quina (see quinine) + -one.