cobalt oxide


Definition of cobalt oxide

: an oxide of cobalt: such as
a : the monoxide CoO obtained usually as a grayish powder

called also cobaltous oxide

b : a gray to blue-black powder containing cobalt monoxide and higher oxides (as tricobalt tetroxide Co3O4) and used chiefly in coloring glass and ceramic ware blue

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to reflect, repel, echo, or resound

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