cobalt cobaea • cobaltammine · · · Info · Definitions · Synonyms · Characters · · cobalt · · Text Latin · · Script 6 · · Length Definitions · · · (noun) a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition. Synonyms: Co, atomic number 27. · · Noun Definition 1 Synonyms · · · co · · Synonym 1 atomic number 27 · · Synonym 2 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 l latin small letter l U+006C o latin small letter o U+006F t latin small letter t U+0074