zaffre\ˈzafə(r)\ less commonly
Definition of zaffer
1a : an impure cobalt oxide obtained as a dark earthy powder usually by roasting cobaltite or smaltite and used in the manufacture of smalt and as a blue ceramic color b : smalt
2 : any of various mixtures of zaffer (as with silica or iron oxide)
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Origin and Etymology of zaffer
Italian zaffera, probably from Latin sapphirus sapphire
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