General Science

  • noun a chemical reaction in which a substance combines with oxygen with loss of electrons

Cars & Driving

  • noun a chemical reaction which increases the oxygen content of a compound or in which a compound or radical loses electrons, i.e. in which the positive valence is increased.


  • The reaction of a chemical compound mixed or exposed to oxygen.
  • Part of the asphalt refining process, wherein oxygen is incorporated inhot, bituminous liquids by blowing it through the melted substance.
  • The hardening of asphalt coating on a roof under exposure to sun and air.


  • A chemical reaction in which an atom, molecule, ion, or radical combines with oxygen. For instance, iron combining with oxygen to form iron oxide.
  • A chemical reaction in which an atom, molecule, ion, or radical loses one or more electrons. For example, a reaction in which iron combines with oxygen, where the iron undergoes a change in valence from 0 to +3.


  • In cooking, the reaction of a food with the oxygen of the air which usually produces off flavours. Oxidation reactions are often promoted by light and high temperature increases the rate of reaction (approximate doubling for every 10°C rise). Anti-oxidants are used to inhibit the reaction.


  • noun the action of making oxides by combining with oxygen or removing hydrogen


  • noun a defect in lithographic printing plates, where the metal surface is corroded where it has not been correctly protected, and so creates little black spots on the printed paper


  • an unwanted change in the flavour or colour of a wine caused by exposure to air that causes a chemical reaction in the wine or grape juice as it reacts with oxygen