A chemical element (symbol Co) with an atomic number of 27: a hard, lustrous, silver-gray metal. / Cobalt blue.

plural of cobaltate

(chemistry) Any of several crystalline materials, containing a triangular lattice of CoO₂ˣ⁻ anions, that are electrical conductors and have unusual magnetic and thermoelectric properties.

(chemistry) Of or relating to cobalt. / (chemistry) Containing cobalt in oxidation state 3.

A village in Connecticut / A town in Ontario. / An unincorporated community in Idaho.

(chemistry) Containing cobalt in oxidation state 2.

plural of cobalt

Treated with, or fortified with a salt of cobalt (typically the sulfate)

A deep blue pigment derived from cobalt; zaffre.

Of the color of the pigment zaffre.