cobaltous, a. Chem.
(kəʊˈbɔːltəs)
Of the nature of cobalt; applied to the di-compounds of the metal, as cobaltous oxide CoO.
| 1863–72 Watts Dict. Chem. I. 1048 Protoxide of cobalt or cobaltous oxide..is a light greenish-grey or olive-green..powder. Ibid. 1049 Hydrated cobaltous oxide, or Cobaltous hydrate..is produced when a cobaltous salt is decomposed by potash out of contact of air. |