Definition of cuprous in English:

cuprous

adjective

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

    cupric
    • ‘The material is a cuprous iron alloy with high carbon and a manganese sulfide additive.’
    • ‘Oxygen may be found as a free gas or as cuprous oxide.’
    • ‘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.’

Origin

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

Pronunciation:

cuprous

/ˈkjuːprəs/