zaffer

UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˈzæfə/US:USA pronunciation: respellingUSA pronunciation: respelling(zaf′ər)


WordReference Random House Unabridged Dictionary of American English © 2026
zaf•fer  (zaf′ər),USA pronunciation n. 
  1. Mineralogy, Ceramicsan artificial mixture, resembling smalt, containing cobalt oxide and, usually, silica, used to produce a blue color in glass and in ceramic glazes.
Also, zaf′fre. 
  • Latin sapphīra sapphire
  • Italian zaffera, perh.
  • 1655–65

Collins Concise English Dictionary © HarperCollins Publishers::
zaffer, zaffre /ˈzæfə/ n
  1. impure cobalt oxide, used to impart a blue colour to enamels
Etymology: 17th Century: from Italian zaffera; perhaps related to Latin sapphīrus sapphire

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