Meaning of cuprous in English:


Pronunciation /ˈkjuːprəs/

See synonyms for cuprous on


  • Of copper with a valency of one; of copper(I).

    ‘These reactions depend on the ability of the reducing sugar to convert cupric sulfate to cuprous oxide with a resulting color change.’
    • ‘The second is a group of cuprous [copper] oxide minerals, and ‘crepitus’ is an interesting medical word with two meanings that appear in the OED - with none in Webster's.’
    • ‘Under magnification, these altered surfaces do not exhibit the naturally occurring corrosion layers, such as red cuprous oxide and green, basic copper carbonate, that might be expected.’
    • ‘Oxygen may be found as a free gas or as cuprous oxide.’
    • ‘The material is a cuprous iron alloy with high carbon and a manganese sulfide additive.’


Mid 17th century partly directly from late Latin cuprum ‘copper’ (reinforced by cupric) + -ous.