From Longman Dictionary of Contemporary EnglishRelated topics: Compoundsoxideox‧ide /ˈɒksaɪd $ ˈɑːk-/ noun [countable, uncountable]HCCa substance which is produced when a substance is combined with oxygeniron oxideExamples from the Corpusoxide• Moreover, a strong presence of ferrousoxide in the walls gives them a redcolor.• Both countries would also limitnitrogenoxideemissions through stricter controls on motorvehicles.• Reduction of nitrogen oxides from cars will need more expensive vehicles - or mean less use.• Traffic now accounts for 51 percent of total nitrogen oxide emissions, compared to 31 percent in 1980.• It would also reducesulphurdioxide and nitrous oxide emissions, which cause acidrain, by 42,000 tonnes.• Nitrous oxide is also responsible for about six percent of the greenhouseeffect.• However, the oxidemineralcontent of the rocks is generally low, at 5-10 percent.• At a given temperature, the oxide with the higher line will be the one that is reduced.Originoxide(1700-1800)Frenchoxygène"oxygen" + acide"acid"