| cobalt | a hard ferromagnetic silver-white bivalent or trivalent metallic element |
|---|---|
| cobalt | a radioactive isotope of cobalt with mass number 60 |
| cobalt | a shade of blue tinged with green |
| cobalt | greenish-blue pigment consisting essentially of cobalt oxide and alumina |
| cobalt | greenish-blue pigment consisting essentially of cobalt oxide and alumina |
| cobalt | a rare silvery-white mineral |