cuprous
/ˈkjuːprəs/
adjective
- Containing or relating to copper, especially in its +1 oxidation state (as opposed to cupric, which is +2).
- The mineral cuprite is a cuprous oxide that has a deep red color.
- In chemistry class, we learned that cuprous compounds often form when copper reacts with certain acids.
- The old statue had a green patina, but underneath it was made of cuprous metal.