zaffer

noun zaf·fer
variants: or zaffre \ˈzafə(r)\ or less commonly zaffree \-frē\ or zaffar or zaffir \-fə(r)\

Definition of zaffer

plural -s
1 a :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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