Meaning of COBALT in English

co ‧ balt /ˈkəʊbɔːlt $ ˈkoʊbɒːlt/ BrE AmE noun [uncountable]

[ Date: 1600-1700 ; Language: German ; Origin: kobalt , from kobold 'goblin' ; because goblins were thought to mix it in with silver found in the ground ]

1 . a shiny silver-white metal that is often combined with other metals or used to give a blue colour to substances such as glass. It is a chemical ↑ element : symbol Co

2 . ( also cobalt blue ) a bright blue-green colour

—cobalt adjective

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.