noun. A hard, brittle metallic element, found associated with nickel, silver, lead, copper, and iron ores and resembling nickel and iron in appearance. It is used chiefly for magnetic alloys, high-temperature alloys, and in the form of its salts for blue glass and ceramic pigments. Atomic number 27; atomic weight 58.9332; melting point 1,495°C; boiling point 2,927°C; specific gravity 8.9; valence 2, 3. cross-reference: Periodic Table.

noun. Chemical symbol, Co; atomic weight, 58.8. A metal of a steel-gray color and a specific gravity variously given at from 8.52 to 8.95.

noun. A tough, lustrous, reddish white metal of the iron group, not easily fusible, and somewhat magnetic. Atomic weight 59.1. Symbol Co.

noun. A commercial name of a crude arsenic used as fly poison.

noun. Same as Erythrite.

noun. a dark blue pigment consisting of some salt of cobalt, as the phosphate, ignited with alumina; -- called also cobalt ultramarine, and Thenard's blue.

noun. earthy arseniate of cobalt.

noun. See Cobaltite.

noun. a pigment consisting essentially of the oxides of cobalt and zinc; -- called also Rinman's green.

noun. a yellow crystalline powder, regarded as a double nitrite of cobalt and potassium.

noun. A chemical element (symbol Co) with an atomic number of 27.

noun. Cobalt blue.

noun. a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition

"In sixth grade, I started my own class newspaper, which my friends and I typed laboriously on the old fashionedmimeographsheets (the kind with the blue backing which left those same stubby fingers smudged in cobalt ink)."

asbolan  asbolite  cobalt blue  cobalt glass  cobalt green  

metal  metallic element  

cobalt 60  

arsenic  barium  beryllium  bismuth  boron