enamel

enamel /ɪˈnæməl/ noun
plural enamels
enamel
/ɪˈnæməl/
noun
plural enamels
Britannica Dictionary definition of ENAMEL
1 
a  : a material like colored glass that is heated until it is liquid and then used to decorate the surface of metal, glass, or pottery
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[count]
b  [count] : something decorated with enamel
2 
[noncount] : the very hard outer layer of a tooth
3 
: a kind of paint that is shiny and very hard when it dries
[noncount]
[count]

— enameled

(US) or British enamelled /ɪˈnæməld/ adjective