from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of or containing cobalt, especially with valence 2.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Containing cobalt in oxidation state 2.
from the GNU version of the Collaborative International Dictionary of English
- adj. Pertaining to, derived from, or containing, cobalt; -- said esp. of cobalt compounds in which the metal has its lower valence.
from The Century Dictionary and Cyclopedia
- Pertaining to or of the nature of cobalt; consisting of or derived from cobalt: specifically applied to compounds in which the cobalt atom appears to be combined as a dyad element.
cobalt + -ous (Wiktionary)