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zaffer
zaf·fer also zaf·fre Z0000800 (zăf′ər)n. An impure oxide of cobalt, used to produce a blue color in enamel and in the making of smalt. [Italian zaffera, from Old French safre, perhaps alteration of safir, sapphire; see sapphire, or from Arabic ṣufr, yellow copper, brass, from 'aṣfar, yellow; see ṣpr in Semitic roots.]zaffer (ˈzæfə) or zaffren (Elements & Compounds) impure cobalt oxide, used to impart a blue colour to enamels[C17: from Italian zaffera; perhaps related to Latin sapphīrus sapphire]zaf•fer (ˈzæf ər) n. a blue pigment containing impure cobalt oxide, used in ceramic glazes. [1655–65; < Italian zaffera, perhaps < Latin sapphīra sapphire] |