1. plural of cobalt: hard silvery-white metallic chemical elements
2. plural of cobalt: deep blue pigments or colors made from cobalt compounds

Examples

• The laboratory stored several cobalts for different experiments.
• The artist mixed various cobalts to create the perfect shade of blue.
• These cobalts are essential for making certain types of steel alloys.
• The pottery was glazed with brilliant cobalts that caught the light.
• Different cobalts produce slightly different blue tones in paint.
• The museum’s collection includes rare cobalts from the 18th century.