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-ous suffix

  /-əs/
  • Used to form adjectives from nouns, to denote:
 -oso, -udo
  • (chemistry) Used in chemical nomenclature to name chemical compounds in which a specified chemical element has a lower oxidation number than in the equivalent compound whose name ends in the suffix -ic. For example sulphuric acid (H2SO4) has more oxygen atoms per molecule than sulphurous acid (H2SO3). See Inorganic nomenclature.
 -oso
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