- an artificial mixture, resembling smalt, containing cobalt oxide and, usually, silica, used to produce a blue color in glass and in ceramic glazes.
Origin of zaffer
1655–65; < Italian zaffera, perhaps < Latin sapphīra sapphire
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Examples from the Web for zaffer
Zaffer was accompanied on this visit to the Pacha by the prime vizier of Cambaya, and both were received with much honour.
- impure cobalt oxide, used to impart a blue colour to enamels
C17: from Italian zaffera; perhaps related to Latin sapphīrus sapphire
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