Cobalt

n.	1.	(Chem.) A tough, lustrous, reddish white metal of the iron group, not easily fusible, and somewhat magnetic. Atomic weight 59.1. Symbol Co.
	2.	A commercial name of a crude arsenic used as fly poison. Cobalt bloom Same as Erythrite. Cobalt blue a dark blue pigment consisting of some salt of cobalt, as the phosphate, ignited with alumina; - called also cobalt ultramarine, and Thenard's blue. Cobalt crust earthy arseniate of cobalt. Cobalt glance (Min.) See Cobaltite. Cobalt green a pigment consisting essentially of the oxides of cobalt and zinc; - called also Rinman's green. Cobalt yellow (Chem.) a yellow crystalline powder, regarded as a double nitrite of cobalt and potassium.

Noun

1.

cobalt - a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition Synonyms: atomic number 27, Co

atomic number 27, Co, cobalt 60, cobaltite, metal, metallic element, smaltite