Copper oxide may refer to:
- Copper(I) oxide (cuprous oxide, Cu2O), a red powder;
- Copper(II) oxide (cupric oxide, CuO), a black powder
Famous quotes containing the word copper:
“He had put, within his reach,
A box of counters and a red-veined stone,
A piece of glass abraded by the beach,
And six or seven shells,
A bottle with bluebells,
And two French copper coins, ranged there with careful art,”
—Coventry Kersey Dighton Patmore (1823–1896)