smalt

smalt

[smawlt]
noun
a coloring agent made of blue glass produced by fusing silica, potassium carbonate, and cobalt oxide, used in powdered form to add color to vitreous materials.

Origin:
1550–60; < Middle French < Italian smalto smalto

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smalt (smɔːlt)
 
n
1.  a type of silica glass coloured deep blue with cobalt oxide
2.  a pigment made by crushing this glass, used in colouring enamels
3.  the blue colour of this pigment
 
[C16: via French from Italian smalto, of Germanic origin; related to smelt1]

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