adj. of, relating to, or containing chromium, especially in oxidation state 2
the GNU version of the Collaborative International Dictionary of English
adj. Of, pertaining to, or derived from, chromium, when this element has a valence lower than that in chromic compounds.
The Century Dictionary and Cyclopedia
Pertaining to, of the nature of, or containing chromium.
Word Usage
"He was soon to leave biology for the field of inorganic chemistry, where his early work was on the oxides of iron-group metals and chromium and a study of the chromous salts."