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